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Soils
62
Soil surveys
55
Agriculture
54
Forests and forestry
42
Sols
27
History
26
Forêts
19
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1
[Parsons, WV] : United States Department of Agriculture, Forest Service, 2012
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2
Bằng Wendel, G. W.
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1972
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1972
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3
Bằng Barnard, Joseph E.
Upper Darby, Pa. : Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1977
Upper Darby, Pa. : Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1977
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4
Bằng Yawney, Harry W. (Harry Wolodymyr), 1928-
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1961
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1961
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5
Bằng Smith, H. Clay
Radnor, PA (5 Radnor Corp CTR STE 200, PO Box 6775, Radnor 19087-8775) : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1994
Radnor, PA (5 Radnor Corp CTR STE 200, PO Box 6775, Radnor 19087-8775) : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1994
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6
Bằng Thomas-Van Gundy, Melissa A., Strager, Michael P.
Newtown Square, PA : United States Department of Agriculture, Forest Service, Northern Research Station, 2012
Newtown Square, PA : United States Department of Agriculture, Forest Service, Northern Research Station, 2012
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7
Bằng Auchmoody, L. R.
Upper Darby, PA : Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1972
Upper Darby, PA : Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1972
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8
Bằng Plass, William T.
Upper Darby, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1973
Upper Darby, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1973
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9
Morgantown, WV : West Virginia University Press, 2006
1st ed.
1st ed.
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Âm thanh
10
Bằng Harr, Milton
Charleston, WV : Quarrier Press : Distributed by Pictorial Histories, 1992
Charleston, WV : Quarrier Press : Distributed by Pictorial Histories, 1992
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11
Bằng Schuler, Thomas M.
Radnor, Pa. (5 Radnor Corporate Center, 100 Matsonford Rd, Suite 200, Radnor 19087-8775) : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1993
Radnor, Pa. (5 Radnor Corporate Center, 100 Matsonford Rd, Suite 200, Radnor 19087-8775) : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1993
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12
Bằng Smith, H. Clay
Radnor, PA (5 Randnor Corp Ctr Ste 200, PO Box 6775, Radnor 19087-8775) : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1994
Radnor, PA (5 Randnor Corp Ctr Ste 200, PO Box 6775, Radnor 19087-8775) : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1994
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13
Bằng Peck, Millard, 1891-
Washington : U.S. Dept. of Agriculture, 1932
Washington : U.S. Dept. of Agriculture, 1932
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14
Bằng Lamson, Neil I.
Upper Darby, Pa. : Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1976
Upper Darby, Pa. : Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1976
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15
Bằng Jones, Thomas Wesley, 1921-
Upper Darby, Pa., Northeastern Forest Experiment Station, 1971
Upper Darby, Pa., Northeastern Forest Experiment Station, 1971
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16
Bằng Smith, H. Clay
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1967
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1967
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17
Washington : [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1972
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18
Bằng Phillips, S. W. (Samuel William), 1894-1933
Washington G.P.O., 1925
Washington G.P.O., 1925
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19
Bằng Smith, H. Clay
[Broomall, Pa.] : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1983
[Broomall, Pa.] : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1983
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20
Bằng Losche, Craig Kendall, 1933-
[Washington] : U. S. Soil Conservation Service, 1967
[Washington] : U. S. Soil Conservation Service, 1967
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