1
by Shigo, Alex L., 1930-, Shigo, Alex L., 1930-
Durham, NH : USDA Northeastern Forest Experiment Station, 1982
Durham, NH : USDA Northeastern Forest Experiment Station, 1982
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2
by Shigo, Alex L., 1930-
Upper Darby, Pa. : Northeastern Forest Experiment Station, 1962
Upper Darby, Pa. : Northeastern Forest Experiment Station, 1962
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3
by Shigo, Alex L., 1930-
Upper Darby, Pa : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1966
Upper Darby, Pa : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1966
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4
by Shigo, Alex L., 1930-
[Washington, D.C.? : U.S. Dept. of Agriculture, Forest Service, 1987
[Washington, D.C.? : U.S. Dept. of Agriculture, Forest Service, 1987
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5
by Shigo, Alex L., 1930-
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1970
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1970
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6
by Shigo, Alex L., 1930-
Upper Darby, Pa. : USDA Forest Service, Northeastern Forest Experiment Station, 1960
Upper Darby, Pa. : USDA Forest Service, Northeastern Forest Experiment Station, 1960
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7
by Shigo, Alex L., 1930-
Broomall, PA : Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station ; For sale by Supt. of Docs. [U.S. G.P.O.], 1984
Broomall, PA : Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station ; For sale by Supt. of Docs. [U.S. G.P.O.], 1984
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8
by Shigo, Alex L., 1930-
[Washington, D.C.? : United States, Forest Service, 1985
[Washington, D.C.? : United States, Forest Service, 1985
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9
by Shigo, Alex L., 1930-
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U. S. Dept. of Agriculture, 1964
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U. S. Dept. of Agriculture, 1964
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10
by Shigo, Alex L., 1930-
[Washington, D.C.?] : U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service, 1985
[Washington, D.C.?] : U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service, 1985
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11
by Shigo, Alex L., 1930-
Durham, N.H. : Shigo and Trees, 1995
Durham, N.H. : Shigo and Trees, 1995
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12
by Shigo, Alex L., 1930-
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U. S. Dept. of Agriculture, 1968
Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U. S. Dept. of Agriculture, 1968
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13
by Shigo, Alex L., 1930-
[Durham, N.H. : USDA Forest Service, NE Forest Experiment Station, 1980
[Durham, N.H. : USDA Forest Service, NE Forest Experiment Station, 1980
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14
by Shigo, Alex L., 1930-
Broomall, Pa. : U.S. Dept. of Agriculture, Forest Service, 1981
Broomall, Pa. : U.S. Dept. of Agriculture, Forest Service, 1981
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15
by Shigo, Alex L., 1930-
Broomall, PA : Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station ; For sale by Supt. of Docs. [U.S. G.P.O.], 1984
Broomall, PA : Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station ; For sale by Supt. of Docs. [U.S. G.P.O.], 1984
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16
by Shigo, Alex L., 1930-
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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17
by Shigo, Alex L., 1930-
Washington, D.C. : Forest Service, U.S. Dept. of Agriculture : For sale by the Supt. of Docs., U.S. G.P.O., 1977
Washington, D.C. : Forest Service, U.S. Dept. of Agriculture : For sale by the Supt. of Docs., U.S. G.P.O., 1977
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18
19
20
by Shigo, Alex L., 1930-
Broomall, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1979
Broomall, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1979
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Book