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Commonwealth of Virginia, Virginia Conservation Commission, Virginia Geological Survey.

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Item Link Original Source
Limited (search only)   v. 1-3, 5-6 1941-1947 Purdue University
Limited (search only)   no.1-6 University of California
Limited (search only)   1-6 (1941-47) University of Minnesota
Full view   no.1 1941 The Ohio State University
Limited (search only)   no.2, Suppl.1 1946 The Ohio State University
Limited (search only)   no.2 1942 The Ohio State University
Limited (search only)   no.3 1945 The Ohio State University
Limited (search only)   no.4 1945 The Ohio State University
Limited (search only)   no.5 1945 The Ohio State University
Limited (search only)   no.6 1947 The Ohio State University