00903cam a22002411 4500 gs 37000085 DLC 20260227111341.0 760430s1937 dcu f000 0 eng c gs 37000085 (OCoLC)2148550 U. S. Geol. survey. Library ViU OCoLC DLC QE75 .B9 no. 878 Wells, Roger Clark, 1877-1944. Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1914-36, tabulated by Roger C. Wells, chief chemist. Washington, U.S. Govt. Print. Off., 1937. x, 134 p. tables. 23 cm. United States. Gelogical survey. Bulletin 878 At head of title: United States Department of the Interior. Rocks Analysis. Ores Sampling and estimation. Chemistry, Analytic. 27338 27338