Thom, Emma Mertina, b. 1883.
Bibliography of North American geology, 1933 and 1934 / by Emma M. Thom.
Washington, D.C. : U.S. G.P.O., 1935.
Includes index.
Paleontology -- North America -- Bibliography.
Petrology -- North America -- Bibliography.
Mineralogy -- North America -- Bibliography.
Geology -- North America -- Bibliography.
Geological Survey (U.S.)
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