Geological Survey of Pennsylvania

MINN:319510008832337

Coal mines and mining

Pennsylvania. Geological Survey

STANFORD:36105013236075

Coal mines and mining

Geological Survey of Pennsylvania

MSU:31293024999884

Coal mines and mining

Geological Survey of Pennsylvania

LCCN:gs07000766

Coal mines and mining

Geological Survey of Pennsylvania

HARVARD:32044102945243

Coal mines and mining

Geological Survey of Pennsylvania

CHI:73752244

Coal

Geological Survey of Pennsylvania / Pennsylvania. State Geologist (1874-1890)

UIUC:30112032046481

Coal mines and mining

Pennsylvania. Geological Survey (2d, 1874-1890)

LCCN:gs07000766

Coal mines and mining

Geological Survey of Pennsylvania / Pennsylvania. State Geologist (1836-1841)

UCAL:B4196183

Geology

Geological Survey of Pennsylvania / Pennsylvania. Board of Commissioners for the Second Geological Survey

UOM:39015035537599

Coal mines and mining

Geological Survey of Pennsylvania

UCAL:B4196184

Geology

Geological Survey of Pennsylvania

PRNC:32101044816344

Coal

Geological Survey of Pennsylvania

UOM:39015035518359

Blue Mountain (Pa.)

Pennsylvania. Board of Commissioners for the Second Geological Survey

UOM:39015053598721

Coal mines and mining

Geological Survey (U.S.)

MINN:31951003070045P

Geology

Richard R. Hice / Pennsylvania. Topographic and Geological Survey Commission

UOM:39015070311538

Cartography

Geological Survey of Pennsylvania / Henry Darwin Rogers

UIUC:30112027201703

Coal

Pennsylvania. Board of Commissioners for the Second Geological Survey

UOM:39015035526428

Paleontology

Geological Survey of Pennsylvania / Henry Darwin Rogers

IND:30000143866519

Coal

Lesley

OCLC:154808418

Geology

Geological Survey (U.S.)

PSU:000015580894

Water quality management

Geological Survey of Pennsylvania / J. Peter Lesley / Charles Albert Ashburner / Frank Alpine Hill / A. P. Berlin / William Griffith / John H. Jones / Isaac R. Moister / Arthur Whitcomb Sheafer / H. N. Sims / A. D. W. Smith / Richard Pennefather Rothwell / Brad Wells / Arthur Winslow / Pennsylvania. Board of Commissioners for the Second Geological Survey

LCCN:45051651

Anthracite coal

Reginald Peter Briggs / Geological Survey (U.S.)

UCR:31210020731178

Land use

Geological Survey of Pennsylvania

HARVARD:32044102945052

Coal

Geological Survey (U.S.)

OCLC:878445686

Geology

Pennsylvania. Board of Commissioners for the Second Geological Survey / Charles Edward Hall

UOM:39015035525693

Geology

Geological Survey of Pennsylvania

OCLC:1314934043

Pennsylvania. Topographic and Geological Survey Commission

UOM:39015070275618

Coal

Geological Survey of Pennsylvania

UOM:39015013242741

Geology

Pennsylvania. Geological Survey

STANFORD:36105013260539

Coal