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  1. 1
    by Wilson, Louis F.
    Published 1977
    “...Forest Service, U.S. Dept. of Agriculture,...”
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    A guide to insect injury of conifers in the Lake States /
  2. 2
    by Schmiege, Donald C.
    Published 1968
    “...Lake States Forest Experiment Station, Forest Service, U.S. Department of Agriculture,...”
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    The forest insect and disease situation, Lake States, 1957 /
  3. 3
    by Beckwith, L. C.
    Published 1956
    “...Lake States Forest Experiment Station, Forest Service, U.S. Department of Agriculture,...”
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    The forest insect and disease situation, Lake States, 1956 /

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