Showing 1 - 2 of 2 for search: 'Johnson, Gordon R.', query time: 0.03s
by Johnson, Gordon R.
Published: U.S. Geological Survey, 1974
Description: 1 map : color ; 70 x 39 cm.
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by Pearson, Robert Carl, 1926-
Published: United States Department of the Interior, Geological Survey, 1980
Description: 1 online resource (vii, 109 pages, 2 pages of plates) : illustrations, maps (some color).
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Geology Geomagnetism Mines and mineral resources