1. Stratigraphy and geologic history of the Montana group and equivalent rocks, Montana, Wyoming, and North and South Dakota, Author/Creator: Gill, James R. 1922-1972. (James Rogers) Publication/Creation: Washington : U.S. Govt. Print. Off, 1973 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 773-779. Access & Availability: Loading
2. Stratigraphy and composition of the Sharon Springs Member of the Pierre Shale in western Kansas Author/Creator: Gill, James R. 1922-1972. (James Rogers) Publication/Creation: Washington : U.S. Govt. Print. Off, 1972 Resource Type: Book Access & Availability: Loading
3. Stratigraphy and composition of the Sharon Springs Member of the Pierre Shale in western Kansas Author/Creator: Gill, James R. 1922-1972, (James Rogers), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1972 Resource Type: Book Access & Availability: Loading
4. The Pierre shale near Kremmling, Colorado and its correlation to the east and the west Author/Creator: Izett, Glen Arthur, 1928- author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1971 Resource Type: Book Access & Availability: Loading
5. The Pierre shale near Kremmling, Colorado : and its correlation to the east and the west Author/Creator: Izett, Glen Arthur, 1928- Publication/Creation: Washington : U.S. Govt. Print. Off, 1971 Resource Type: Book Access & Availability: Loading
6. Stratigraphy and nomenclature of some Upper Cretaceous and lower Tertiary rocks in south-central Wyoming Author/Creator: Gill, James R. 1922-1972, (James Rogers), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1970 Resource Type: Book Access & Availability: Loading
7. Stratigraphy and nomenclature of some Upper Cretaceous and lower Tertiary rocks in south-central Wyoming, Author/Creator: Gill, James R. 1922-1972. (James Rogers) Publication/Creation: Washington : U.S. Govt. Print. Off, 1970 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 666-668. Access & Availability: Loading
8. The Red Bird section of the upper Cretaceous Pierre shale in Wyoming Author/Creator: Gill, James R. 1922-1972, (James Rogers), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1966 Resource Type: Book Access & Availability: Loading
9. The Red Bird section of the upper Cretaceous Pierre shale in Wyoming Author/Creator: Gill, James R. 1922-1972. (James Rogers) Publication/Creation: Washington : U.S. Govt. Print. Off, 1966 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 391-395. Access & Availability: Loading
10. Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain areas, North Dakota Author/Creator: Gill, James R. 1922-1972, (James Rogers), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1965 Resource Type: Book Access & Availability: Loading