01323cam a22003371 4500 gs 29000124 DLC 20260227111333.0 770510m19259999pauabf b s001 0 eng gs 29000124 (OCoLC)2951374 DLC NcRS OCoLC DLC premarc n-us-pa TN805.P4 A45 Pennsylvania. Bureau of Topographic and Geologic Survey Bituminous coal fields of Pennsylvania. Harrisburg, 1925- v in . illus., plates, maps (part fold.) tables, diagrs. 23 cm. Its Bulletin M 6 Includes bibliographies. 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. Bituminous coal. Coal Pennsylvania. Coal Analysis. Ashley, Geo. H. (George Hall), 1866- Sisler, James Donaldson, 1894- Reese, John F. United States. Bureau of Mines. Pennsylvania. Bureau of Topographic and Geologic Survey. Bulletin M 6. 26715 26715