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1
by Lytle, William S.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1976

Book
2
Capitola, CA : The Environmental Directory, 1990
Tri-States/Pittsburgh ed.

Serial
4
by Kobus, Ken
Upper Darby, PA (P.O. Box 389, Upper Darby 19082) : Pennsylvania Railroad Technical and Historical Society, 1996

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Book
6
by Kobus, Ken
Upper Darby, Pa. : Pennsylvania Railroad Technical and Historical Society, 2007

This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Book
7
Morgantown, W. Va. : Institute for the History of Technology & Industrial Archaeology, West Virginia University, 1993

Book
8
Bethel Park, Pa. : Crowder Press, 1978

This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Book
9
by Ingram, David K.
[Pittsburgh, Pa.?] : U.S. Dept. of the Interior, Bureau of Mines, 1987

Government Document Book
10
by Kobus, Ken
Upper Darby, PA (P.O. Box 389, Upper Darby 19082) : Pennsylvania Railroad Technical and Historical Society, 1997

Book
11
by Roth, Paul, (Photographer)
[Pittsburgh, Pennsylvania?] : [Paul Roth?], 2008

Book
12
by Fulton, John W.
Reston, Va. : Denver, CO : U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services, 2004

Government Document Book
13
by Eavenson, Howard N. (Howard Nicholas), 1873-1953
New York, N.Y. : The American Institute of Mining and Metallurgical Engineers, 1938

Book
15
by Ingram, David K.
[Pittsburgh, Pa.] : U.S. Dept. of the Interior, Bureau of Mines, 1987

Book
16
by O'Neill, Bernard J., 1920-
Harrisburg : Pennsylvania Geological Survey, 1974

Map
17
by Roberts, Charles S. (Charles Swann)
Baltimore, MD : Barnard, Roberts and Co., 2006
1st ed.

Book
18
by Lytle, William S.
Harrisburg : Pennsylvania Geological Survey, 1976

Book
19
by O'Neill, Bernard J., 1920-
Harrisburg : Pennsylvania Geological Survey, 1974

Book
20
by O'Neill, Bernard J., 1920-
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1974

Government Document Book