1. 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
2. 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