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  1. 1
    Selection and use of snags by secondary cavity-nesting birds of the ponderosa pine forest /
    Government Document Book
  2. 2
    Constructing wooden boxes for cavity-nesting birds /
    by Gary, Howard L.
    Published 1980
    Government Document Book
  3. 3
    An artificial bald eagle nest structure /
    by Grubb, Teryl G.
    Published 1980
    Government Document Book
  4. 4
    Constructing bald eagle nests with natural materials.
    by Grubb, Teryl G.
    Published 1995
    Government Document Microform Book
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