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By: Shigo, Alex L.,Edition:Publication info: Upper Darby, Pa, Northeastern Forest Experiment Station, 1962Volume: no.168Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Shigo, Alex L.,Edition:Publication info: Upper Darby, Pa, USDA, Forest Service, [1976?]Volume: 1976Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Shigo, Alex L., - Northeastern Forest Experiment Station (Radnor, Pa.)Edition:Publication info: Broomall, PA, U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1984Volume: NE-INF-58-84Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: