Report of the Commissioners of the State Geological and Topographical Survey

Oil and Gas Map of Southwestern Pennsylvania, 1915

Publications of the First and Second Geological Surveys

Report ...: Volume 9

Bituminous Coal Fields of Pennsylvania ...: pt.1. General information on coal, by G. H. Ashley. 1928. pt.2. Detailed description of coal fields, by J. D. Sisler. 2d ed. 1932. pt.3. Coal resources, by J. F. Reese and J. D. Sisler. 1928. pt.4. Coal analyses, prepared by U.S. Bureau of mines. 1925