1. Geology of Precambrian rocks, Idaho Springs district, Colorado Author/Creator: Moench, Robert Hadley, 1926- author Publication/Creation: Washington, D.C. : United States Department of the Interior, Geological Survey, 1964 Resource Type: Book Access & Availability: Loading
2. Geology of the Precambrian W (lower Precambrian) rocks in western Gogebic County, Michigan Author/Creator: Schmidt, Robert Gordon, 1924- Publication/Creation: Washington : U.S. Govt. Print. Off., 1976 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1406-1413. Access & Availability: Loading
3. Geology of the Precambrian W (lower Precambrian) rocks in western Gogebic County, Michigan Author/Creator: Schmidt, Robert Gordon, 1924- author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1976 Resource Type: Book Access & Availability: Loading