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161
by Geyer, Alan R.
Harrisburg : Pennsylvania Bureau of Topographic and Geologic Survey, 1958
Harrisburg : Pennsylvania Bureau of Topographic and Geologic Survey, 1958
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Book
162
by Munn, Malcolm John, 1874-
Washington, D. C. : U. S. Geological Survey, 1912
Washington, D. C. : U. S. Geological Survey, 1912
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Book
163
by Radbruch-Hall, Dorothy H., 1920-
Washington, D.C. : U.S. G.P.O., 1984
Washington, D.C. : U.S. G.P.O., 1984
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164
[Harrisburg] : Geological Survey of Pennsylvania, 1888
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Book
165
by Gray, Carlyle
Harrisburg, [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1958
Harrisburg, [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1958
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166
by Heeren, Lillian A.
Harrisburg, Pa. : Pennsylvania Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1946
Harrisburg, Pa. : Pennsylvania Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1946
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Government Document
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167
[Harrisburg] : Geological Survey of Pennsylvania, 1889
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Map
168
by Clapp, Frederick G. (Frederick Gardner), 1879-1944
Washington, D.C. : United States Geological Survey, 1907
Washington, D.C. : United States Geological Survey, 1907
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Book
169
[Harrisburg] : Second Geological Survey of Pennsylvania, 1884
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Map
170
by Pollock, Steve (Stephen Thomas)
New York : Facts on File, 1993
New York : Facts on File, 1993
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Book
171
[Harrisburg, Pa.] : Lane S. Hart, State Printer, 1878
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Map
172
173
Harrisburg, Pa. : Commonwealth of Pennsylvania, 1930
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Book
174
by Walter, Heinrich, 1898-1989
Berlin ; Heidelberg ; New York : Springer-Verlag, 1975
Berlin ; Heidelberg ; New York : Springer-Verlag, 1975
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Book
175
by Dickey, Parke Atherton, 1909-
Harrisburg, Pa. : Pennsylvania Dept. of Internal Affairs, Topographic and Geologic Survey, 1945
Harrisburg, Pa. : Pennsylvania Dept. of Internal Affairs, Topographic and Geologic Survey, 1945
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Government Document
Book
176
by Capps, Stephen R. (Stephen Reid), 1881-1949
Washington [D.C.] : Department of the Interior, United States Geological Survey, 1912
Washington [D.C.] : Department of the Interior, United States Geological Survey, 1912
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177
by Heeren, Lillian A.
Harrisburg, Pa. : Pennsylvania Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1946
Harrisburg, Pa. : Pennsylvania Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1946
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178
179
by Dunwoody, H. H. C.
Washington : Government Printing Office, 1883
Washington : Government Printing Office, 1883
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180
by Mayfield, Earle B., Shimabukuro, F. I. (Fred I.)
Boulder, Colo. : Dept. of Commerce, National Ocenic and Atmospheric Administration, World Data Center A for Solar-Terrestrial Physics, 1978
Boulder, Colo. : Dept. of Commerce, National Ocenic and Atmospheric Administration, World Data Center A for Solar-Terrestrial Physics, 1978
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