1. Paleocene fresh-water mollusks from Southern Montana 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. 214. Access & Availability: Loading
2. 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
3. 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