TY  - BOOK
AU  - Wells,Roger Clark
TI  - Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1914-36,
T2  - United States.  Gelogical survey.  Bulletin 878
AV  - QE75 .B9 no. 878
PY  - 1937///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Rocks
KW  - Analysis
KW  - Ores
KW  - Sampling and estimation
KW  - Chemistry, Analytic
N1  - At head of title: United States Department of the Interior
ER  -