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Naturalists--Colorado and Paleontology--Colorado--Teller County by Cockerell, Theodore D. A. (Theodore Dru Alison), 1866-1948, author of Florissant Fossil Beds National Monument (Colo.) and Florissant Fossil Beds National Monument (Colo.) and Florissant Fossil Beds National Monument (Colo.) from 1906 July 8
- UC Boulder