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Incoming Resources
- Europe
- Metropolitan and micropolitan statistical areas wall maps, November 2007, U.S. Census Bureau
- Map of assessed shale gas in the United States, 2012, by U.S. Geological Survey National Assessment of Oil and Gas Resources Team, and Laura R.H. Biewick, compiler
- Metropolitan and micropolitan statistical areas wall maps, November 2008, U.S. Census Bureau
- Metropolitan and micropolitan statistical areas wall maps, December 2009, U.S. Census Bureau