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3. Gypsum and anhydrite in the United States exclusive of Alaska and Hawaii / [cartographic material]
1962. 2016-02-25T14:50:17Z. 2016-07-23T21:08:12Z. Withington, Charles F. (Charles Francis), 1920-. Dept. of the Interior, U.S. Geological Survey. English. cartographic image. Public. United States and United States.
1962. 2016-02-25T14:34:51Z. 2016-07-23T21:08:11Z. Chidester, A. H. (Alfred Herman), 1914-. Dept. of the Interior, U.S. Geological Survey. English. cartographic image. Public. United States and United States.
