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  1. 1
    by Powell, Jerry A.
    Published 1978
    “...Forest Service, U.S. Dept. of Agriculture,...”
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    Nearctic pine tip moths of the genus Rhyacionia, biosystematic review : Lepidoptera--Tortricidae, Olethreutinae /
  2. 2
    Published 1977
    “...Forest Service, U.S. Dept. of Agriculture,...”
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    Cavity-nesting birds of North American forests /
  3. 3
    by Burns, Russell M.
    Published 1990
    “...Dept. of Agriculture, Forest Service : For sale by the Supt. of Docs., U.S. G.P.O.,...”
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    Silvics of North America /

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