Author
- Pennsylvania Inspectors of Mines 6 results
- Lehigh Coal and Navigation Company 5 results
- Roberts, William F. 5 results
- Alleghany Railroad and Coal Company 4 results
- Arnold, Andrew Bernard 3 results
- Little Schuylkill Navigation Rail Road and Coal Company 3 results
- Pennsylvania 3 results
- Philadelphia Record 3 results
- Ashburner, Charles A. (Charles Albert), 1854-1889 2 results
- Aurand, Harold W. 2 results
- Ely, John 2 results
- Ingham, Charles F. 2 results
- Kulp, Geo. B. (George Brubaker), 1839-1915 2 results
- Lehigh Coal and Navigation Co 2 results
- Lesley, John Peter, 1819-1903 2 results
- Markham, Edwin, 1852-1940 2 results
- Maxwell, Volney L., 1804-1873 2 results
- Maxwell, Volney Lee, 1804-1873 2 results
- Mill Creek Coal Co 2 results
- Pennsylvania Anthracite Coal Industry Commission 2 results
- Pennsylvania. Board of Commissioners for the Second Geological Survey 2 results
- Pennsylvania. Bureau of Topographic and Geologic Survey 2 results
- Pennsylvania. General Assembly. Senate. Committee on the Judiciary 2 results
- Sheafer, P. W. (Peter Wenrick), 1819- 2 results
- Sisler, James D. 2 results
- Thompson, Heber Samuel, 1840-1911 2 results
- United States. Bureau of Mines 2 results
- United States. Coal Commission 2 results
- Wallace, Anthony F. C., 1923- 2 results
- Wyoming Historical and Geological Society 2 results
- AP Wide World Photos 1 results
- Alleghany Railroad and Coal Co 1 results
- Ashburton Coal Company 1 results
- Ashmead, Dever Campbell, 1884- 1 results
- Associated Press 1 results
- Atherton, Sarah Henry 1 results
- Augrund, Harold Wilson, 1940- 1 results
- Baltimore and Lorberry Mutual Coal Company 1 results
- Barclay Coal Company 1 results
- Barclay Railroad Company 1 results
- Beaver Meadow Railroad and Coal Company 1 results
- Bedford, Emeline D. T. 1 results
- Big Creek Coal Company 1 results
- Billinger, R. D. (Robert Dominick), 1899-1980 1 results
- Black Heath Coal Company 1 results
- Bowen, Ele 1 results
- Bowen, Eli, 1824- 1 results
- Brown, Bruce 1 results
- Brown, Charles Stuart 1915-1993 1 results
- Campbell, Stuart 1 results more…