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  1. By: White, Richard A - Turner, Melvin D
    Type: Article
    In: American fern journal
    Volume: 102
    Date: 2012
    Page Range: 91--113
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Schmid, Rudolf - Turner, Melvin D
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 24
    Date: 1977
    Page Range: 68--74
    Publication Info: Berkeley California Botanical Society