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References
- ↑ "Home Page for Dr. Clark R. Chapman". www.boulder.swri.edu. Retrieved 2020-01-19.
- ↑ "Discover Dialogue: Clark R. Chapman". Discover Magazine. Retrieved 2020-01-19.
- ↑ "International Astronomical Union". www.iau.org. Retrieved 2020-01-19.
- ↑ May, Brian; Chapman, Clark; Jones, Thomas (2016-06-30). "Staying vigilant for hazardous asteroid impacts should be a priority. Here's why". The Guardian. ISSN 0261-3077 . Retrieved 2020-01-19.
- ↑ "Clark R. Chapman's Publications". www.boulder.swri.edu. Retrieved 2020-01-19.
- ↑ Schweickart, Russell (November 2003). "The Asteroid Tugboat". Scientific American. 289 (5): 54–61. Bibcode:2003SciAm.289e..54S. doi:10.1038/scientificamerican1103-54. PMID 14564813 – via JSTOR.
- ↑ "Home Page for Dr. Clark R. Chapman". www.boulder.swri.edu. Retrieved 2020-01-19.
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