1. The national atlas of the United States of America. National wilderness preservation system Yale Public content 2004. 2004-08-24T17:29:47Z. 2015-10-27T22:02:02Z. Geological Survey (U.S.). U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the U.S. Geological Survey. English. Public. United States.