Coal Fields of the Conterminous United States

Digitally Compiled By John Tully

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Map documentation

Created by the EERT WWW Staff.

U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/of/1996/of96-092/map.htm
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Last modified: 10:02:54 Mon 07 Aug 2006
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