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1. 1:1,000,000-Scale National Wilderness Preservation System of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile consists of National Wilderness Preservation System areas of 320 acres or more, in the United States, Puerto Rico, and the U... National Atlas of the United States.

2. Hazardous Waste, Generated, Shipped, Received 2001-2007

2001. National Atlas of the United States. This polygon shapefile portrays the hazardous waste generated, shipped, and received by state and other areas within the United States, Puerto Rico... National Atlas of the United States.

3. National Wilderness Preservation System of the United States, 2006

1972. National Atlas of the United States. This polygon shapefile contains National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S.... National Atlas of the United States.