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References
- ↑ Cataclysms on the Columbia, by John Elliott Allen and Marjorie Burns with Sam C. Sargent, 1986. Pages 175–189.
- 1 2 3 4 ""Corvallis Gazette-Times 02 Jun 1990 Saturday"". Corvallis Gazette-Times . 2 Jun 1990. p. A3. Retrieved 27 October 2022.
- ↑ Carnegie Institution of Washington (1940). "1939-1940 Year Book - Carnegie Institution of Washington". Year Book of Carnegie Institution of Washington (39): 299–300 – via Archive.org.
- ↑ ALLISON, IRA S. (1945). "PUMICE BEDS AT SUMMER LAKE, OREGON". Geological Society of America Bulletin. 56 (8): 789. doi:10.1130/0016-7606(1945)56[789:pbaslo]2.0.co;2. ISSN 0016-7606.
- ↑ ALLISON, IRA S. (1966). "PUMICE AT SUMMER LAKE, OREGON—A CORRECTION". Geological Society of America Bulletin. 77 (3): 329. doi:10.1130/0016-7606(1966)77[329:pasloc]2.0.co;2. ISSN 0016-7606.
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