Geological map of Indiana County.

Geological map of Indiana County. J.P. Lesley, State Geologist. W.G. Platt, Ass't. Geologist. 1878. Julius Bien Photolith, New York. Lane S. Hart, State Printer. Grand atlas, Division I, Part I. Sheet no. XXVI.

Geological Survey of Pennsylvania

1878

1885

Second Geological Survey of Pennsylvania

1:120 000

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