You searched for: Publisher National Atlas of the United States Remove constraint Publisher: National Atlas of the United States Subject Geoscientific Information Remove constraint Subject: Geoscientific Information Subject Caves Remove constraint Subject: Caves Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Place Delaware Remove constraint Place: Delaware Data type Polygon Remove constraint Data type: Polygon Format Shapefile Remove constraint Format: Shapefile
1984. Tobin, B. D. and Weary, David J. This polygon shapefile is a digital version of U.S. Geological Survey Open File Report 2004-1352, Engineering Aspects of Karst. The open-file repor... National Atlas of the United States.