Bedrock geologic map, coal-resource maps, and digital datasets of part of the Windber quadrangle, Somerset county, Pennsylvania /

द्वारा Shaulis, James R.
प्रकाशित 2007

Bedrock geologic map, coal-resource maps, and digital datasets of the Kersey quadrangle, Elk and Clearfield counties, Pennsylvania /

द्वारा Dodge, Clifford H.
प्रकाशित 2005

Bedrock geologic map, coal-resource maps, and digital datasets of the Brandy Camp quadrangle, Elk, Jefferson, and Clearfield counties, Pennsylvania /

द्वारा Dodge, Clifford H.
प्रकाशित 2004