In 2018, the Small Arms Survey reported that there are over one billion small arms distributed globally, of which 857 million (about 85 percent) are in civilian hands. [1] [2] The survey stated that American civilians account for an estimated 393 million (about 46 percent) of the worldwide total of civilian held firearms, [2] or about 120.5 firearms for every 100 American residents. [2]
From 1994 to 2023, gun ownership increased 28% in America. In 2023, about 16.7 million firearms were sold in the U.S. In the first four months of 2024, nearly 5.5 million firearms were sold, averaging around 1.3 million per month. About 72% of gun owners say they own a gun primarily for protection. [3]
The world's armed forces control about 133 million (approximately 13 percent) of the global total of small arms, of which over 43 percent belong to two countries: Russia (30.3 million) and China (27.5 million). [1] Law enforcement agencies control about 23 million (about 2 percent) of the global total of small arms. [1] Gun ownership is a protected right in countries such as the United States and Yemen. [4]
The following data comes from the Small Arms Survey. For more tables see: Estimated number of civilian guns per capita by country and Percent of households with guns by country.
Countries and territories | Estimate of firearms in civilian possession | Population 2017 | Estimate of civilian firearms per 100 people |
---|---|---|---|
Afghanistan | 4,270,000 | 34,169,000 | 12.5 |
Albania | 350,000 | 2,911,000 | 12.0 |
Algeria | 877,000 | 41,064,000 | 2.1 |
American Samoa (United States) | 400 | 56,000 | 0.7 |
Andorra | 10,000 | 69,000 | 14.1 |
Angola | 2,982,000 | 26,656,000 | 11.2 |
Antigua and Barbuda | 5,000 | 94,000 | 5.4 |
Argentina | 3,256,000 | 44,272,000 | 7.4 |
Armenia | 186,000 | 3,032,000 | 6.1 |
Aruba (Netherlands) | 3,000 | 105,000 | 2.6 |
Australia | 3,573,000 | 24,642,000 | 14.5 |
Austria | 2,577,000 | 8,592,000 | 30.0 |
Azerbaijan | 362,000 | 9,974,000 | 3.6 |
Bahamas | 74,000 | 397,000 | 18.8 |
Bahrain | 181,000 | 1,419,000 | 12.8 |
Bangladesh | 659,000 | 164,828,000 | 0.4 |
Barbados | 10,000 | 286,000 | 3.5 |
Belarus | 581,000 | 9,459,000 | 6.1 |
Belgium | 1,451,000 | 11,444,000 | 12.7 |
Belize | 37,000 | 375,000 | 10.0 |
Benin | 33,000 | 11,459,000 | 0.3 |
Bermuda (United Kingdom) | 3,000 | 61,000 | 4.6 |
Bhutan | 6,000 | 793,000 | 0.8 |
Bolivia | 218,000 | 11,053,000 | 2.0 |
Bosnia and Herzegovina | 1,185,000 | 3,793,000 | 31.2 |
Botswana | 97,000 | 2,344,000 | 4.1 |
Brazil | 17,510,000 | 211,243,000 | 8.3 |
Brunei | 6,000 | 434,000 | 1.4 |
Bulgaria | 590,000 | 7,045,000 | 8.4 |
Burkina Faso | 175,000 | 19,173,000 | 0.9 |
Burundi | 238,000 | 11,936,000 | 2.0 |
Cambodia | 717,000 | 16,076,000 | 4.5 |
Cameroon | 510,000 | 24,514,000 | 2.1 |
Canada | 12,708,000 | 36,626,000 | 34.7 |
Cape Verde (Cabo Verde) | 31,000 | 533,000 | 5.7 |
Cayman Islands (United Kingdom) | 6,000 | 62,000 | 9.2 |
Central African Republic | 94,000 | 5,099,000 | 1.8 |
Chad | 151,000 | 14,965,000 | 1.0 |
Channel Islands | 23,000 | 165,000 | 14.0 |
Chile | 2,220,000 | 18,313,000 | 12.1 |
China | 49,735,000 | 1,388,233,000 | 3.6 |
Christmas Island | 0 | 2,000 | 0.0 |
Colombia | 4,971,000 | 49,068,000 | 10.1 |
Comoros | 12,000 | 826,000 | 1.5 |
Costa Rica | 493,000 | 4,906,000 | 10.0 |
Croatia | 576,000 | 4,210,000 | 13.7 |
Cuba | 234,000 | 11,390,000 | 2.1 |
Curaçao | 4,000 | 160,000 | 2.6 |
Cyprus | 285,000 | 839,000 | 34.0 |
Czech Republic | 1,323,000 | 10,555,000 | 12.5 |
DR Congo | 946,000 | 82,243,000 | 1.2 |
Denmark | 567,000 | 5,712,000 | 9.9 |
Djibouti | 28,000 | 911,000 | 3.1 |
Dominica | 5,000 | 73,000 | 6.2 |
Dominican Republic | 795,000 | 10,767,000 | 7.4 |
Ecuador | 402,000 | 16,626,000 | 2.4 |
Egypt | 3,931,000 | 95,215,000 | 4.1 |
El Salvador | 737,000 | 6,167,000 | 12.0 |
England and Wales | 2,731,000 | 58,877,000 | 4.6 |
Equatorial Guinea | 112,000 | 894,000 | 12.5 |
Eritrea | 23,000 | 5,482,000 | 0.4 |
Estonia | 65,000 | 1,306,000 | 5.0 |
Ethiopia | 377,000 | 104,345,000 | 0.4 |
Falkland Islands (United Kingdom) | 2,000 | 3,000 | 66.7 |
Faroe Islands (Denmark) | 5,000 | 49,000 | 9.9 |
Fiji | 5,000 | 903,000 | 0.5 |
Finland | 1,793,000 | 5,541,000 | 32.4 |
France | 12,732,000 | 64,939,000 | 19.6 |
French Guiana (France) | 55,000 | 283,000 | 19.6 |
French Polynesia (France) | 7,000 | 289,000 | 2.5 |
Gabon | 61,000 | 1,801,000 | 3.4 |
Gambia | 137,000 | 2,120,000 | 6.5 |
Georgia | 402,000 | 3,973,000 | 10.1 |
Germany | 15,822,000 | 80,636,000 | 19.6 |
Ghana | 2,280,000 | 28,657,000 | 8.0 |
Gibraltar (United Kingdom) | 1,000 | 32,000 | 4.1 |
Greece | 1,920,000 | 10,893,000 | 17.6 |
Greenland (Denmark) | 13,000 | 56,000 | 22.3 |
Grenada | 5,000 | 108,000 | 4.6 |
Guadeloupe (France) | 40,000 | 472,000 | 8.5 |
Guam (United States) | 20,000 | 174,000 | 11.5 |
Guatemala | 2,062,000 | 17,005,000 | 12.1 |
Guinea | 130,000 | 13,291,000 | 1.0 |
Guinea-Bissau | 29,000 | 1,933,000 | 1.5 |
Guyana | 122,000 | 774,000 | 15.8 |
Haiti | 291,000 | 10,983,000 | 2.6 |
Holy See | 0 | 1,000 | 0.0 |
Honduras | 1,171,000 | 8,305,000 | 14.1 |
Hong Kong (China) | 265,000 | 7,402,000 | 3.6 |
Hungary | 1,023,000 | 9,788,000 | 10.5 |
Iceland | 106,000 | 334,000 | 31.7 |
India | 71,101,000 | 1,342,513,000 | 5.3 |
Indonesia | 82,000 | 263,510,000 | 0.03 |
Iran | 5,890,000 | 80,946,000 | 7.3 |
Iraq | 7,588,000 | 38,654,000 | 19.6 |
Ireland | 342,000 | 4,749,000 | 7.2 |
Israel | 557,000 | 8,323,000 | 6.7 |
Italy | 8,609,000 | 59,798,000 | 14.4 |
Ivory Coast (Côte d'Ivoire) | 1,049,000 | 23,816,000 | 4.4 |
Jamaica | 246,000 | 2,813,000 | 8.8 |
Japan | 377,000 | 126,045,000 | 0.3 |
Jordan | 1,473,000 | 7,877,000 | 18.7 |
Kazakhstan | 504,000 | 18,064,000 | 2.8 |
Kenya | 750,000 | 48,467,000 | 1.5 |
Kiribati | 900 | 116,000 | 0.8 |
Kosovo | 436,000 | 1,831,000 | 23.8 |
Kuwait | 685,000 | 4,100,000 | 16.7 |
Kyrgyzstan | 171,000 | 6,125,000 | 2.8 |
Laos | 215,000 | 7,038,000 | 3.0 |
Latvia | 205,000 | 1,945,000 | 10.5 |
Lebanon | 1,927,000 | 6,039,000 | 31.9 |
Lesotho | 105,000 | 2,185,000 | 4.8 |
Liberia | 97,000 | 4,730,000 | 2.1 |
Libya | 851,000 | 6,409,000 | 13.3 |
Liechtenstein | 11,000 | 38,000 | 28.8 |
Lithuania | 385,000 | 2,831,000 | 13.6 |
Luxembourg | 110,000 | 584,000 | 18.9 |
Macau (China) | 22,000 | 606,000 | 3.6 |
Madagascar | 168,000 | 25,613,000 | 0.7 |
Malawi | 47,000 | 18,299,000 | 0.3 |
Malaysia | 217,000 | 31,164,000 | 0.7 |
Maldives | 23,000 | 376,000 | 6.2 |
Mali | 206,000 | 18,690,000 | 1.1 |
Malta | 119,000 | 421,000 | 28.3 |
Marshall Islands | 300 | 53,000 | 0.5 |
Martinique (France) | 34,000 | 396,000 | 8.5 |
Mauritania | 120,000 | 4,266,000 | 2.8 |
Mauritius | 106,000 | 1,281,000 | 8.3 |
Mexico | 16,809,000 | 130,223,000 | 12.9 |
Micronesia | 700 | 106,000 | 0.7 |
Moldova | 121,000 | 4,055,000 | 3.0 |
Monaco | 7,000 | 38,000 | 18.4 |
Mongolia | 242,000 | 3,052,000 | 7.9 |
Montenegro | 245,000 | 626,000 | 39.1 |
Montserrat (United Kingdom) | 300 | 5,000 | 5.4 |
Morocco | 1,690,000 | 35,241,000 | 4.8 |
Mozambique | 1,337,000 | 29,538,000 | 4.5 |
Myanmar | 877,000 | 54,836,000 | 1.6 |
Namibia | 396,000 | 2,569,000 | 15.4 |
Nauru | 0 | 10,000 | 0.0 |
Nepal | 444,000 | 29,187,000 | 1.5 |
Netherlands | 442,000 | 17,033,000 | 2.6 |
New Caledonia (France) | 115,000 | 270,000 | 42.5 |
New Zealand | 1,212,000 | 4,605,000 | 26.3 |
Nicaragua | 323,000 | 6,218,000 | 5.2 |
Niger | 117,000 | 21,564,000 | 0.5 |
Nigeria | 6,154,000 | 191,836,000 | 3.2 |
Northern Ireland | 206,000 | 1,873,000 | 11.0 |
Northern Mariana Islands (United States) | 1,000 | 56,000 | 2.6 |
North Korea | 76,000 | 25,405,000 | 0.3 |
Norway | 1,537,000 | 5,331,000 | 28.8 |
Oman | 792,000 | 4,741,000 | 16.7 |
Pakistan | 43,917,000 | 196,744,000 | 22.3 |
Palau | 100 | 22,000 | 0.5 |
Palestine | 56,000 | 4,952,000 | 1.1 |
Panama | 436,000 | 4,051,000 | 10.8 |
Papua New Guinea | 79,000 | 7,934,000 | 1.0 |
Paraguay | 1,140,000 | 6,812,000 | 16.7 |
Peru | 633,000 | 32,166,000 | 2.0 |
Philippines | 3,776,000 | 103,797,000 | 3.6 |
Poland | 968,000 | 38,564,000 | 2.5 |
Portugal | 2,186,000 | 10,265,000 | 21.3 |
Puerto Rico (United States) | 422,000 | 3,679,000 | 11.5 |
Puntland | 246,000 | 1,995,000 | 12.3 |
Qatar | 390,000 | 2,338,000 | 16.7 |
Congo | 119,000 | 4,866,000 | 2.4 |
Réunion (France) | 171,000 | 873,000 | 19.6 |
Romania | 506,000 | 19,238,000 | 2.6 |
Russia | 17,620,000 | 143,375,000 | 12.3 |
Rwanda | 66,000 | 12,160,000 | 0.5 |
Saint Kitts and Nevis | 2,000 | 57,000 | 3.4 |
Saint Lucia | 6,000 | 188,000 | 3.4 |
Saint Martin (France) | 3,000 | 32,000 | 8.5 |
Saint Vincent and the Grenadines | 4,000 | 110,000 | 3.4 |
Samoa | 20,000 | 196,000 | 10.1 |
San Marino | 5,000 | 32,000 | 15.6 |
São Tomé and Príncipe | 7,000 | 198,000 | 3.4 |
Saudi Arabia | 12,564,000 | 32,743,000 | 53.7 |
Scotland | 305,000 | 5,436,000 | 5.6 |
Senegal | 323,000 | 16,054,000 | 2.0 |
Serbia | 2,719,000 | 6,946,000 | 39.1 |
Seychelles | 4,000 | 98,000 | 4.1 |
Sierra Leone | 35,000 | 6,733,000 | 0.5 |
Singapore | 20,000 | 5,785,000 | 0.3 |
Sint Maarten (Netherlands) | 2,000 | 40,000 | 4.2 |
Slovakia | 355,000 | 5,432,000 | 6.5 |
Slovenia | 324,000 | 2,071,000 | 15.6 |
Solomon Islands | 1,000 | 606,000 | 0.2 |
Somalia | 1,145,000 | 9,225,000 | 12.4 |
Somaliland | 456,000 | 3,823,000 | 11.9 |
South Africa | 5,351,000 | 55,436,000 | 9.7 |
South Korea | 79,000 | 50,705,000 | 0.2 |
South Sudan | 1,255,000 | 13,096,000 | 9.6 |
Spain | 3,464,000 | 46,070,000 | 7.5 |
Sri Lanka | 494,000 | 20,905,000 | 2.4 |
Sudan | 2,768,000 | 42,166,000 | 6.6 |
Suriname | 88,000 | 552,000 | 15.9 |
Swaziland | 64,000 | 1,320,000 | 4.8 |
Sweden | 2,296,000 | 9,921,000 | 23.1 |
Switzerland | 2,332,000 | 8,454,000 | 27.6 |
Syria | 1,547,000 | 18,907,000 | 8.2 |
Taiwan | 10,000 | 23,405,000 | 0.04 |
Tajikistan | 37,000 | 8,858,000 | 0.4 |
Tanzania | 427,000 | 56,878,000 | 0.8 |
Thailand | 10,342,000 | 68,298,000 | 15.1 |
East Timor | 3,000 | 1,237,000 | 0.3 |
Togo | 58,000 | 7,692,000 | 0.8 |
Tonga | 9,000 | 108,000 | 8.0 |
Trinidad and Tobago | 43,000 | 1,369,000 | 3.2 |
Tunisia | 123,000 | 11,495,000 | 1.1 |
Turkey | 13,249,000 | 80,418,000 | 16.5 |
Turkmenistan | 23,000 | 5,503,000 | 0.4 |
Turks and Caicos Islands (United Kingdom) | 1,000 | 35,000 | 3.3 |
Tuvalu | 100 | 10,000 | 1.2 |
Uganda | 331,000 | 41,653,000 | 0.8 |
Ukraine | 4,396,000 | 44,405,000 | 9.9 |
United Arab Emirates | 1,569,000 | 9,398,000 | 16.7 |
United States | 393,347,000 | 326,474,000 | 120.5 |
Uruguay | 1,198,000 | 3,457,000 | 34.7 |
Uzbekistan | 127,000 | 30,691,000 | 0.4 |
Vanuatu | 11,000 | 276,000 | 3.9 |
Venezuela | 5,895,000 | 31,926,000 | 18.5 |
Vietnam | 1,562,000 | 95,415,000 | 1.6 |
British Virgin Islands | 300 | 31,000 | 0.8 |
U.S. Virgin Islands | 18,000 | 107,000 | 16.6 |
Yemen | 14,859,000 | 28,120,000 | 52.8 |
Zambia | 158,000 | 17,238,000 | 0.9 |
Zimbabwe | 455,000 | 16,338,000 | 2.8 |
Some studies suggest that higher rates of gun ownership are associated with higher homicide rates, [11] [12] [13] although Gary Kleck argues that the highest-quality studies show that gun ownership does not increase homicide rates. [14] Higher rates of gun ownership are also associated with higher suicide rates [15] [16] and higher accidental gun death rates. [17] [18] [19] The availability of illegal guns, but not that of legal guns, is associated with higher rates of violent crime. [20]
An international study by UNICRI researchers from 2001 examined the link between household gun ownership and overall homicide, overall suicide, as well as gun homicide and gun suicide rates amongst 21 countries. Significant correlations between household gun ownership and rates of gun suicides for both genders, and gun homicide rates involving female victims were found. There were no significant correlations detected for total homicide and suicide rates, as well as gun homicide rates involving male victims. [21] This study has been criticized for combining high-income countries (like the United States) with middle-income countries (like Estonia); if middle-income countries are excluded from the analysis, a strong relationship emerges between gun ownership and homicide. [22] However the Hemenway study has been criticized in response as well. When removing the United States as an outlier and using the superior proxy of gun ownership in the study (percentage of firearm suicides over all suicides), the relationship ceases to be significant. The association between gun ownership and homicide rates across nations is dependent on the inclusion of the U.S. [23] Studies in Canada that examined the levels of gun ownership by province have found no correlations with provincial overall suicide rates. [24] A 2011 study conducted looking at the effects of gun control legislation passed in Canada and the associated effects in homicide rates found no significant reductions in homicide rates as a result of legislation. [25] A case-control study conducted in New Zealand looking at household gun ownership and the risk of suicides found no significant associations. [26]
Gun control, or firearms regulation, is the set of laws or policies that regulate the manufacture, sale, transfer, possession, modification, or use of firearms by civilians.
More Guns, Less Crime is a book by John R. Lott Jr. that says violent crime rates go down when states pass "shall issue" concealed carry laws. He presents the results of his statistical analysis of crime data for every county in the United States during 29 years from 1977 to 2005. Each edition of the book was refereed by the University of Chicago Press. As of 2019, the book is no longer published by the University of Chicago Press. The book examines city, county and state level data from the entire United States and measures the impact of 13 different types of gun control laws on crime rates. The book expands on an earlier study published in 1997 by Lott and his co-author David Mustard in The Journal of Legal Studies and by Lott and his co-author John Whitley in The Journal of Law and Economics, October 2001.
The right to keep and bear arms is a legal right for people to possess weapons (arms) for the preservation of life, liberty, and property. The purpose of gun rights is for self-defense, as well as hunting and sporting activities. Countries that guarantee a right to keep and bear arms include Albania, Czech Republic, Guatemala, Ukraine, Mexico, the United States, Yemen, and Switzerland.
Arthur L. Kellermann is an American physician and epidemiologist. Until his resignation in November 2022, he served as a professor of emergency medicine at the VCU School of Medicine, senior vice president of health sciences for Virginia Commonwealth University, and CEO of the VCU Health System. He was formerly professor and dean of the F. Edward Hébert School of Medicine at the Uniformed Services University of the Health Sciences. Kellerman served as director of the RAND Institute of Health and founded the department of emergency medicine at Emory University and the Center for Injury Control at Rollins School of Public Health. His writings include 200 publications on various aspects of emergency cardiac care, health services research, injury prevention and the role of emergency departments in providing health care to the poor. Kellermann is known for his research on the epidemiology of firearm-related injuries and deaths, which he interpreted not as random, unavoidable acts but as preventable public-health priorities. Kellermann and his research have been strongly disputed by gun rights organizations, in particular by the National Rifle Association of America, although Kellermann's findings have been supported by a large body of peer-reviewed research finding that increasing gun ownership is associated with increased rates of homicide and violence.
Gary Kleck is a criminologist and the David J. Bordua Professor Emeritus of Criminology at Florida State University.
Gun laws in Australia are predominantly within the jurisdiction of Australian states and territories, with the importation of guns regulated by the federal government. In the last two decades of the 20th century, following several high-profile killing sprees, the federal government coordinated more restrictive firearms legislation with all state governments.
Gun politics in the United States is characterized by two primary opposing ideologies regarding private firearm ownership.
A suicide method is any means by which a person may choose to end their life. Suicide attempts do not always result in death, and a non-fatal suicide attempt can leave the person with serious physical injuries, long-term health problems, or brain damage.
Gun culture in the United States refers to the behaviors, attitudes, and beliefs surrounding the ownership and use of firearms by private citizens. Gun ownership is deeply rooted in the country’s history and is legally protected by the Second Amendment to the United States Constitution. Firearms in the U.S. are commonly used for self-defense, hunting, and recreational activities.
Gun violence is a term of political, economic and sociological interest referring to the tens of thousands of annual firearms-related deaths and injuries occurring in the United States.
Gun-related violence is violence against a person committed with the use of a firearm to inflict a gunshot wound. Gun violence may or may not be considered criminal. Criminal violence includes homicide and assault with a deadly weapon. Depending on the jurisdiction, suicide or attempted suicide may also be considered a crime. Non-criminal violence includes accidental or unintentional injury and death. Also generally included in gun violence statistics are military or para-military activities.
This is a list of US states by gun deaths and rates of violence. In 2021, there were 26,000 gun suicides and 21,000 gun homicides, together making up a sixth of deaths from external causes. Gun deaths make up about half of all suicides, but over 80% of homicides.
This is a list of countries by estimated number of privately owned guns per 100 people. The Small Arms Survey 2017 provides estimates of the total number of civilian-owned guns in a country. It then calculates the number per 100 people. This number for a country does not indicate the percentage of the population that owns guns. This is because individuals can own more than one gun.
The Small Arms Survey (SAS) is an independent research project located at the Graduate Institute of International and Development Studies in Geneva, Switzerland. It provides information on all aspects of small arms and armed violence, as a resource for governments, policy-makers, researchers, and activists, as well as research on small arms issues.
Defensive gun use (DGU) is the use or presentation of a firearm for self-defense, defense of others or, in some cases, protecting property. The frequency of incidents involving DGU and their effectiveness in providing safety and reducing crime are controversial issues in gun politics and criminology, chiefly in the United States. Different authors and studies employ different criteria for what constitutes a defensive gun use which leads to controversy in comparing statistical results. Perceptions of defensive gun use are recurring themes in discussions over gun rights, gun control, armed police, open and concealed carry of firearms.
A universal background check for guns is a policy that requires a background check for all gun sales or transfers, regardless of where they occur or who is involved. This includes sales at gun shows, private sales between individuals, and sales made online. The idea is to close loopholes in existing laws that currently allow some gun purchases to occur without background checks.
David McDowall is an American criminologist and distinguished teaching professor in the School of Criminal Justice at University at Albany, SUNY, where he is also co-director of the Violence Research Group. Educated at Portland State University and Northwestern University, he taught at the University of Maryland, College Park from 1990 until joining the University at Albany in 1996. He has published a number of studies pertaining to gun violence in the United States.
The National Firearms Agreement (NFA), also sometimes called the National Agreement on Firearms, the National Firearms Agreement and Buyback Program, or the Nationwide Agreement on Firearms, was an agreement concerning firearm control made by Australasian Police Ministers' Council (APMC) in 1996, in response to the Port Arthur massacre that killed 35 people. Four days after the killings, Australian Prime Minister John Howard told Parliament “We need to achieve a total prohibition on the ownership, possession, sale and importation of all automatic and semi-automatic weapons. That will be the essence of the proposal that will be put by the Commonwealth government at the meeting on Friday...". The APMC would agree to and form the NFA 12 days after the massacre on the 10th of May 1996.
A child access prevention law makes it illegal for an adult to keep a gun in a place and manner so that a child can easily access and fire it. Proponents of these laws, such as the Law Center to Prevent Gun Violence in the United States, argue that they are effective at reducing accidental gun deaths among children, since they reduce accessibility and thereby risk. The National Rifle Association of America has lobbied against such laws, arguing that they are ineffective and infringe on the rights of gun owners to protect their homes.
{{cite web}}
: CS1 maint: multiple names: authors list (link)CNN's attribution: Developed countries are defined based on the UN classification, which includes 36 countries. Source: Institute for Health Metrics and Evaluation (Global Burden of Disease 2019), Small Arms Survey (Civilian Firearm Holdings 2017)
The number of deaths per 100,000 total population. Source: wonder.cdc.gov● Household firearm ownership data from Schell, Terry L.; Peterson, Samuel; Vegetabile, Brian G.; Scherling, Adam; Smart, Rosanna; Morral, Andrew R. (April 22, 2020). "State-Level Estimates of Household Firearm Ownership". rand.org. RAND Corporation. p. 21. Archived from the original on May 5, 2023. Fig. 2. PDF file (download link)
This article's use of external links may not follow Wikipedia's policies or guidelines.(March 2024) |