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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Seilheimer, Allen V
    Type: Article
    In: American fern journal
    Volume: 64
    Date: 1974
    Page Range: 13--14
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Seilheimer, Allen V
    Type: Article
    In: American fern journal
    Volume: 68
    Date: 1978
    Page Range: 67--70
    Publication Info: [Washington, etc.] American Fern Society