1. Paleocene flora of the Rocky Mountains and Great Plains Author/Creator: Brown, Roland W. 1893-1961, (Roland Wilbur), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1962 Resource Type: Book Access & Availability: Loading
2. Paleocene flora of the Rocky Mountains and Great Plains Author/Creator: Brown, Roland W. 1893-1961. (Roland Wilbur) Publication/Creation: Washington : U.S. Govt. Print. Off, 1962 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 375-377. Access & Availability: Loading