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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Marengo, Norman P
    Type: Article
    In: American fern journal
    Volume: 72
    Date: 1982
    Page Range: 30--30
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Marengo, Norman P - Badalamente, Marie A
    Type: Article
    In: American fern journal
    Volume: 68
    Date: 1978
    Page Range: 52--54
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Marengo, Norman P
    Type: Article
    In: American fern journal
    Volume: 54
    Date: 1964
    Page Range: 129--136
    Publication Info: [Washington, etc.] American Fern Society