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2006
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1. Historical Anthracite coal seam, mining and permit data for Pennsylvania
2006. Pennsylvania Dept. of Environmental Protection, Bureau of Mining and Reclamation (BMR). Coverages containing Anthracite coal seam data by quadrangle for the state of Pennsylvania. Digitized from the Harrisburg Bureau of Mining and Recl...
2. Historical Bituminous coal seam, mining and permit data for Pennsylvania
2006. Pennsylvania Dept. of Environmental Protection, Bureau of Mining and Reclamation (BMR). Coverages containing industrial mineral mining data by quadrangle for the state of Pennsylvania. Digitized from the Harrisburg Bureau of Mining and...