1. Fresh-water mollusks of Cretaceous Age from Montana and Wyoming Author/Creator: Yen, Teng-Chien Publication/Creation: Washington : U.S. Govt. Print. Off, 1951 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 233 A-E. Access & Availability: Loading
2. Fresh-water mollusks of Cretaceous Age from Montana and Wyoming Author/Creator: Yen, Teng-Chien, author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1951 Resource Type: Book Access & Availability: Loading
3. Palynology of the upper Campanian (Cretaceous) Judith River Formation, north-central Montana Author/Creator: Tschudy, Bernadine D., author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1973 Resource Type: Book Access & Availability: Loading
4. Palynology of the upper Campanian (Cretaceous) Judith River Formation, north-central Montana, Author/Creator: Tschudy, Bernadine D. Publication/Creation: Washington : U.S. Govt. Print. Off, 1973 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 768-772. Access & Availability: Loading
5. Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana Author/Creator: Cobban, William A., 1916-2015, author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1976 Resource Type: Book Access & Availability: Loading
6. Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana : a report of a formal subdivision and age assignments of a classic Cretaceous area Publication/Creation: Washington : U.S. Govt. Print. Off, 1976 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 970-975. Access & Availability: Loading