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  1. By: Frye, Theodore C. (Theodore Christian), - Jackson, Mabel Mcmurry
    Type: Article
    In: American fern journal
    Volume: 3
    Date: 1913
    Page Range: 65--83
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Frye, Theodore C. (Theodore Christian), - Jackson, Mabel Mcmurry
    Type: Article
    In: American fern journal
    Volume: 3
    Date: 1913
    Page Range: 97--108
    Publication Info: [Washington, etc.] American Fern Society