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  1. 1
    by Wilson, Louis F.
    Published 1977
    “...Forest Service, U.S. Dept. of Agriculture,...”
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    Government Document Electronic eBook
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    A guide to insect injury of conifers in the Lake States /
  2. 2
    by Shigo, Alex L., 1930-
    Published 1983
    “...Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station,...”
    Government Document Book
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    Tree defects : a photo guide /

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