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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Petrik-Ott, Aleta Jo - Ott, Franklyn D
    Type: Article
    In: American fern journal
    Volume: 72
    Date: 1982
    Page Range: 31--31
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Petrik-Ott, Aleta Jo - Ott, Franklyn D
    Type: Article
    In: American fern journal
    Volume: 70
    Date: 1980
    Page Range: 29--30
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Petrik-Ott, Aleta Jo - Ott, Franklyn D
    Type: Article
    In: American fern journal
    Volume: 66
    Date: 1976
    Page Range: 111--111
    Publication Info: [Washington, etc.] American Fern Society