1. 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.
