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  1. By: Cooperrider, Tom S.
    Type: Article
    In: American fern journal
    Volume: 58
    Date: 1968
    Page Range: 176--178
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Cooperrider, Tom S.
    Type: Article
    In: Rhodora
    Volume: 98
    Date: 1996
    Page Range: 460--462
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Cooperrider, Tom S.
    Type: Article
    In: Rhodora
    Volume: 64
    Date: 1962
    Page Range: 63--67
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],