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9 Geological Survey (U.S.) 5 Jenness, Jane E. 3 Lopez, David A. 3 Roggensack, Kurt 2 Johnson, William D. 2 New Mexico. Bureau of Mines and Mineral Resources more ... 2 University of Arizona. Bureau of Geology and Mineral Technology 2 Utah Geological and Mineral Survey 1 California. Division of Mines and Geology 1 La Fortune, James R. 1 Michigan. Geological Survey Division 1 Nevada Bureau of Mines and Geology 1 Prinz, William C., 1928- 1 Sargent, Kenneth A. 1 Scarborough, Robert B. see all ... less ...
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