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by Kunkel, Paul Vance, 1903-
Allentown, Pa., 1939
Allentown, Pa., 1939
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2
by Frakes, Lawrence A.
Harrisburg, Pa. : Commonwealth of Pennsylvania [Department of Internal Affairs, Bureau of Topographic and Geological Survey], 1967
Harrisburg, Pa. : Commonwealth of Pennsylvania [Department of Internal Affairs, Bureau of Topographic and Geological Survey], 1967
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3
4
by Anderson, John Edward
Cambridge, Mass., M.I.T. Press, 1963
Cambridge, Mass., M.I.T. Press, 1963
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5
by Schaeffer, Robert L., 1917-
Philadelphia [publisher not identified] 1949
Philadelphia [publisher not identified] 1949
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6
by Sherwood, W. Cullen (William Cullen)
Harrisburg, PA. : Commonwealth of Pennsylvania [Department of Internal Affairs, Bureau of Topographic and Geological Survey], 1964
Harrisburg, PA. : Commonwealth of Pennsylvania [Department of Internal Affairs, Bureau of Topographic and Geological Survey], 1964
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