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1
by Poth, Charles W.
Harrisburg : Pennsylvania Geological Survey, 1963

Book
2
by Poth, Charles W.
Harrisburg, Pa. : [Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey], 1977

Book
3
by Poth, Charles W.
Harrisburg : Pennsylvania Geological Survey, 1973

Book
4
by Poth, Charles W.
Harrisburg : [Topographic and Geologic Survey], 1968

Book
5
by Poth, Charles W.
Harrisburg : Pennsylvania Geological Survey, 1973

Book
6
by Poth, Charles W.
Harrisburg : Pennsylvania Geological Survey, 1973

Book
7
by Poth, Charles W.
Harrisburg [Topographic and Geologic Survey], 1977

Book
8
by Poth, Charles W.
Harrisburg [Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey] 1968

Unknown
9
by Poth, Charles W.
Harrisburg, 1963

Book
11
by Poth, Charles W.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1968

Government Document Book
12
by Poth, Charles W.
Harrisburg [Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1963

Government Document Book
13
by Poth, Charles W.
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1973

Government Document Book
14
by Poth, Charles W.
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1977

Government Document Book
15
by Poth, Charles W.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1972

Government Document Book
16
by Poth, Charles W.
Harrisburg, Pa. : [Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey], 1973

Book
17
by Poth, Charles W.
Harrisburg, Pa. : [Commonwealth of Pennsylvania Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey], 1973

Book
18
by Poth, Charles W.
Harrisburg : [Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey], 1968

Book
19
by Poth, Charles W.
Harrisburg : Pennsylvania Geological Survey, 1973

Book
20
by Poth, Charles W.
Harrisburg : [Bureau of Topographic and Geologic Survey], 1972

Book