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National Atlas of the United States
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Subject
Coalfields
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Massachusetts
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Place
United States
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Format
Shapefile
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Year
2001
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1. Coal Fields of the United States
2001. Eastern Energy Resource Surveys Team (Geological Survey). This polygon shapefile shows the coal fields of Alaska and the conterminous United States. Most of the material for the conterminous United States ... National Atlas of the United States.