1. Jurassic ammonites from southern Alaska Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: [Washington, D.C.] : [U.S. G.P.O.], [1962-1964] Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 418-421. Access & Availability: Loading
2. Jurassic (Bathonian and Callovian) ammonites in eastern Oregon and western Idaho Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1981 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1141-1144. Access & Availability: Loading
3. 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
4. Jurassic (Bathonian or early Callovian) ammonites from Alaska and Montana Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1962 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 372-374. Access & Availability: Loading
5. Jurassic (Oxfordian and Late Callovian) ammonites from the western interior region of the United States Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1982 Resource Type: Book Access & Availability: Loading
6. Jurassic (Oxfordian and Late Callovian) ammonites from the western interior region of the United States Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. G.P.O., 1982 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1232-1239. Access & Availability: Loading
7. Jurassic paleobiogeography of Alaska, Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1973 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 801-802. Access & Availability: Loading
8. Jurassic paleobiogeography of Alaska 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
9. Jurassic paleobiogeography of the conterminous United States in its continental setting Author/Creator: Imlay, Ralph W. 1908-1989, (Ralph Willard), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1980 Resource Type: Book Access & Availability: Loading
10. Jurassic paleobiogeography of the conterminous United States in its continental setting Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1980 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1062-1065. Access & Availability: Loading