1. Upper Jurassic mollusks from eastern Oregon and western Idaho, Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1964 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 481-483. Access & Availability: Loading
2. Upper Jurassic mollusks from eastern Oregon and western Idaho Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : U.S. Department of the Interior, Geological Survey, 1964 Resource Type: Book Access & Availability: Loading
3. Upper Jurassic stratigraphy of some adjacent parts of Texas, Louisiana, and Arkansas, Author/Creator: Dickinson, Kendell A., 1931- Publication/Creation: Washington : U.S. Govt. Print. Off, 1968 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 594 A-M. Access & Availability: Loading