1. Jurassic (Bathonian and Callovian) ammonites in eastern Oregon and western Idaho Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
2. Middle Jurassic (Bajocian) ammonites from eastern Oregon Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1973 Resource Type: Book Access & Availability: Loading
3. Ammonites from the Buchia zones in northwestern California and southwestern Oregon Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1970 Resource Type: Book Access & Availability: Loading
4. 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
5. Ammonites of early cretaceous age (Valanginian and Hauterivian) from the Pacific coast states Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1960 Resource Type: Book Access & Availability: Loading