1. 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
2. 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
3. The Rampart gold placer region, Alaska Author/Creator: Prindle, L. M. 1865-1956. (Louis Marcus) Publication/Creation: Washington : Govt. Print. Off, 1906 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 275-280. Access & Availability: Loading
4. 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
5. 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
6. 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
7. The Reany Creek Formation, Marquette County, Michigan : description of a new formation of Precambrian age in northern Michigan Author/Creator: Puffett, Willard P. 1922- (Willard Penry), author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1969 Resource Type: Book Access & Availability: Loading
8. Recent developments in the Aspen district, Colorado, Author/Creator: Knopf, Adolph, 1882-1966 Publication/Creation: Washington : Govt. Print. Off, 1926 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 785-786. Access & Availability: Loading
9. Recognition criteria of igneous and metamorphic rocks on aerial photographs of Chichagof and Kruzof Islands, Southeastern Alaska Author/Creator: Pomeroy, John S., 1929- author Publication/Creation: Washington, D.C. : United States Department of the Interior, Geological Survey, 1964 Resource Type: Book Access & Availability: Loading
10. Recognition criteria of igneous and metamorphic rocks on aerial photographs of Chichagof and Kruzof Islands, Southeastern Alaska Author/Creator: Pomeroy, John S., 1929- Publication/Creation: Washington [D.C.] : U.S. G.P.O., 1964 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1043. Access & Availability: Loading