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United States. Minerals Management Service
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Geological Survey (U.S.)
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Boundaries
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1. Official Protraction Diagram and Leasing Map Boundaries, United States, 2001
2001. United States. Minerals Management Service. This polygon shapefile shows the official protraction diagram (OPD) and leasing map boundaries for the United States, covering areas of the Outer C... Geological Survey (U.S.).