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Images by Cockerell%2C Theodore D. A. %28Theodore Dru Alison%29%2C 1866-1948%2C author and Cockerell%2C Theodore D. A. %28Theodore Dru Alison%29%2C 1866-1948%2C author of Florissant Fossil Beds National Monument %28Colo.%29 from Undated
- UC Boulder