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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Smith, Alan R., - Palmer, Daniel D
    Type: Article
    In: American fern journal
    Volume: 85
    Date: 1995
    Page Range: 63--63
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Palmer, Daniel D
    Type: Article
    In: American fern journal
    Volume: 95
    Date: 2005
    Page Range: 80--83
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Palmer, Daniel D
    Type: Article
    In: American fern journal
    Volume: 92
    Date: 2002
    Page Range: 97--97
    Publication Info: [Washington, etc.] American Fern Society
  4. By: Wagner, Warren H.‏ (Warren Herbert),‏ - Wagner, F. S. (Florence Signaigo), - Palmer, Daniel D - Hobdy, Robert W
    Type: Article
    In: Contributions from the University of Michigan Herbarium
    Volume: 22
    Date: 1999
    Page Range: 135--187
    Publication Info: Ann Arbor, University Herbarium, University of Michigan, 1939-