Pennsylvania Bureau of Topographic and Geologic Survey creator Ashley, Geo. H. (George Hall) 1866- Sisler, James Donaldson 1894- Reese, John F. United States Bureau of Mines. text bibliography pau Harrisburg 1925- 1925 9999 monographic eng

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v in . illus., plates, maps (part fold.) tables, diagrs. 23 cm. vol. 1, pt. 1. General information on coal, by G.H. Ashley. 1928. pt. 2. Detailed description of coal fields, by J.D. Sisler. 1926. pt. 3. Coal resources, by J.F. Reese and J.D. Sisler. 1928. pt. 4. Coal analysis, prepared by U.S. Bureau of Mines. 1925. Includes bibliographies. n-us-pa Bituminous coal Coal Pennsylvania Coal Analysis TN805.P4 A45 Pennsylvania. Bureau of Topographic and Geologic Survey. gs 29000124 DLC 770510 20260227111333.0 gs 29000124