1. Paleocene and lower Eocene units in the southern part of the Piceance Creek basin, Colorado Author/Creator: Donnell, John R. 1919- (John Roswell) Publication/Creation: [Washington] : [U.S. Govt. Print. Off], [1969] Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1274. Access & Availability: Loading
2. Paleocene and lower Eocene units in the southern part of the Piceance Creek basin, Colorado Author/Creator: Donnell, John R. 1919- (John Roswell), author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1969 Resource Type: Book Access & Availability: Loading
3. Paleocene-Eocene bathyal and abyssal benthic foraminifera from the Atlantic Ocean Author/Creator: Tjalsma, R. C. Publication/Creation: New York : Micropaleontology Press, American Museum of Natural History, 1983 Resource Type: Book Access & Availability: Loading