Annual report on mining activities /
Commonwealth of Pennsylvania, Department of Environmental Protection.

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Item Link Original Source
Limited (search only)   1995 Pennsylvania State University
Limited (search only)   1996 Pennsylvania State University
Limited (search only)   1997 Pennsylvania State University
Limited (search only)   1998 Pennsylvania State University
Limited (search only)   1998 Pennsylvania State University
Limited (search only)   1999 Pennsylvania State University
Limited (search only)   1999 Pennsylvania State University
Limited (search only)   2000 Pennsylvania State University
Limited (search only)   2000 Pennsylvania State University