1. Radioactivity reconnaissance of part of north-central Clear Creek county, Colorado Author/Creator: Wells, John David, 1926- author Publication/Creation: Washington, D.C. : United States Department of the Interior, Geological Survey, 1954 Resource Type: Book Access & Availability: Loading
2. Radiometric ages of igneous rocks from Pima, Santa Cruz, and Cochise Counties, southeastern Arizona Author/Creator: Marvin, Richard F., author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1973 Resource Type: Book Access & Availability: Loading
3. Radiometric ages of igneous rocks from Pima, Santa Cruz, and Cochise Counties, southeastern Arizona Publication/Creation: Washington : U.S. Govt. Print. Off, 1973 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1373-1381. Access & Availability: Loading
4. The Rampart gold placer region, Alaska Author/Creator: Prindle, L. M. 1865-1956, (Louis Marcus), author Publication/Creation: Washington, D.C. : Department of the Interior, United States Geological Survey, 1906 Resource Type: Book Access & Availability: Loading
5. Rare-earth mineral deposits of the Mountain Pass district, San Bernardino County, California, Author/Creator: Olson, J. C. 1917-2013. (Jerry Chipman) Publication/Creation: Washington : U.S. Govt. Print. Off, 1954 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 261-263. Access & Availability: Loading
6. Rare-earth mineral deposits of the Mountain Pass district, San Bernardino County, California Author/Creator: Olson, J. C. 1917-2013, (Jerry Chipman), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1954 Resource Type: Book Access & Availability: Loading
7. Rare-earth-bearing apatite at Mineville, Essex County, New York Author/Creator: McKeown, F. A. 1920- (Francis Alexander) Publication/Creation: Washington [D.C.] : U.S. G.P.O., 1956 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1046. Access & Availability: Loading
8. Rare-earth-bearing apatite at Mineville, Essex County, New York Author/Creator: McKeown, F. A. 1920- (Francis Alexander), author Publication/Creation: Washington, D.C. : United States Department of the Interior, Geological Survey, 1956 Resource Type: Book Access & Availability: Loading
9. Raymond quadrangle, Madera and Mariposa Counties, California : analytical data : modal and chemical data and isotopic ages of the plutonic rocks of the Raymond quadrangle Author/Creator: Bateman, Paul C., 1910-2007, author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
10. The Reany Creek Formation, Marquette County, Michigan Author/Creator: Puffett, Willard P. 1922- (Willard Penry) Publication/Creation: Washington : U.S. Govt. Print. Off, 1969 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1274. Access & Availability: Loading