1. Mafic-ultramafic igneous rocks and associated carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado, Author/Creator: Parker, Raymond L. (Raymond Laurence) Publication/Creation: Washington : U.S. Govt. Print. Off, 1970 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 645-649. Access & Availability: Loading
2. Geochemistry of niobium and tantalum, Author/Creator: Parker, Raymond L. (Raymond Laurence) Publication/Creation: Washington : U.S. Govt. Print. Off, 1968 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 611-614. Access & Availability: Loading
3. Composition of the earth's crust : discussion of methods of determining the crustal composition Author/Creator: Parker, Raymond L. (Raymond Laurence) Publication/Creation: Washington : U.S. Govt. Print. Off, 1967 Resource Type: Book Access & Availability: Loading
4. Geology of the Curlew quadrangle, Ferry County, Washington Author/Creator: Parker, Raymond L. (Raymond Laurence) Publication/Creation: Washington [D.C.] : U.S. G.P.O., 1964 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1168-1172. Access & Availability: Loading