Author
Pennsylvania Inspectors of Mines
6
Lehigh Coal and Navigation Company
5
Roberts, William F.
5
Alleghany Railroad and Coal Company
4
Arnold, Andrew Bernard
3
Little Schuylkill Navigation Rail Road and Coal Company
3
Pennsylvania
3
Philadelphia Record
3
Ashburner, Charles A. 1854-1889
2
Aurand, Harold W.
2
Ellsworth Collieries Company Employees' Death and Accident Association
2
Ely, John
2
Ingham, Charles F.
2
Kulp, Geo. B. 1839-1915
2
Lehigh Coal and Navigation Co
2
Lesley, John Peter, 1819-1903
2
Markham, Edwin, 1852-1940
2
Maxwell, Volney L., 1804-1873
2
Maxwell, Volney Lee, 1804-1873
2
Mill Creek Coal Co
2
Pennsylvania Anthracite Coal Industry Commission
2
Pennsylvania. Board of Commissioners for the Second Geological Survey
2
Pennsylvania. Bureau of Topographic and Geologic Survey
2
Pennsylvania. General Assembly. Senate. Committee on the Judiciary
2
Sheafer, P. W. 1819-
2
Sisler, James D.
2
Thompson, Heber Samuel, 1840-1911
2
United States. Bureau of Mines
2
United States. Coal Commission
2
Wallace, Anthony F. C., 1923-
2
Wyoming Historical and Geological Society
2
AP Wide World Photos
1
Alleghany Railroad and Coal Co
1
Ashburton Coal Company
1
Ashmead, Dever Campbell, 1884-
1
Associated Press
1
Atherton, Sarah Henry
1
Augrund, Harold Wilson, 1940-
1
Baltimore and Lorberry Mutual Coal Company
1
Barclay Coal Company
1
Barclay Railroad Company
1
Beaver Meadow Railroad and Coal Company
1
Bedford, Emeline D. T.
1
Big Creek Coal Company
1
Billinger, R. D. 1899-1980
1
Black Heath Coal Company
1
Bowen, Ele
1
Bowen, Eli, 1824-
1
Brown, Bruce
1
Brown, Charles Stuart 1915-1993
1
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