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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Gliessman, Stephen R
    Type: Article
    In: American fern journal
    Volume: 68
    Date: 1978
    Page Range: 41--44
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Gliessman, Stephen R - Muller, Cornelius H. (Cornelius Herman),
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 21
    Date: 1972
    Page Range: 299--304
    Publication Info: Berkeley, California Botanical Society,