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  1. 1
    Published 1969
    Conference Proceeding Book
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    Birch Symposium held at the University of New Hampshire, Durham, N.H., 19-21 August 1969.
  2. 2
    Published 1971
    Conference Proceeding Book
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    Oak symposium : proceedings.
  3. 3
    by Shigo, Alex L., 1930-
    Published 1983
    Government Document Book
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    Saved in:
    Tree defects : a photo guide /

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