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History
42
Soils
23
Soil surveys
20
Geology
17
Law and legislation
17
Études pédologiques
16
Archives
14
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1
Washington, D.C. : U.S. G.P.O. : For sale by the Supt. of Docs., 1942
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2
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3
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4
Harrisburg, Pa. : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1945
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5
Bằng Pomeroy, John S., 1929-
[Reston, Va.?] : Alexandria, VA : U.S. Dept. of the Interior, Geological Survey ; For sale by the Distribution Branch, U.S. Geological Survey, 1982
[Reston, Va.?] : Alexandria, VA : U.S. Dept. of the Interior, Geological Survey ; For sale by the Distribution Branch, U.S. Geological Survey, 1982
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6
[Harrisburg, Pa.?] : The Division, 1995
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7
8
9
[Harrisburg] : The Council, 1984
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10
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11
Harrisburg : The Center, 1985
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12
Harrisburg, Pa. : The Committee, 1985
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13
[Harrisburg] : Local Government Commission, 1986
[Rev.] October 1986.
[Rev.] October 1986.
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14
Harrisburg, Pa. : State Health Data Center, 1985
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15
Reading, Pa. : Board of County Commissioners, 1941
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16
Harrisburg, Pa. : Wm. Stanley Ray, State Printer, 1915
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17
Bằng 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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18
[Harrisburg : The Board 1996
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19
Beaver, Pa. : Board of County Commissioners, 1942
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