Mineral resources of Johnstown, Pennsylvania and vicinity /
Phalen, William Clifton, 1877-1949.
Mineral resources of Johnstown, Pennsylvania and vicinity / by W.C. Phalen and Lawrence Martin; surveyed in cooperation with the Topographic and Geologic Survey of Pennsylvania. - Washington : Government Printing Office, 1911. - 142 p : ill., 7 plates (incl. 2 fold. maps) ; 23 cm. - United States. Geological Survey. Bulletin ; 447 . - Geological Survey bulletin ; 447. .
gs 11000155
Mines and mineral resources--Pennsylvania.
Coal mines and mining--Pennsylvania.
TN24.P4 / P6
Mineral resources of Johnstown, Pennsylvania and vicinity / by W.C. Phalen and Lawrence Martin; surveyed in cooperation with the Topographic and Geologic Survey of Pennsylvania. - Washington : Government Printing Office, 1911. - 142 p : ill., 7 plates (incl. 2 fold. maps) ; 23 cm. - United States. Geological Survey. Bulletin ; 447 . - Geological Survey bulletin ; 447. .
gs 11000155
Mines and mineral resources--Pennsylvania.
Coal mines and mining--Pennsylvania.
TN24.P4 / P6