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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: Delevoryas, Theodore, - Hueber, Francis M - Banks, Harlan P. - Eggert, Donald A. - White, Richard A - Tryon, Rolla M. (Rolla Milton),
    Type: Article
    In: Memoirs of the Torrey Botanical Club
    Volume: 21
    Issue: 5
    Date: 1964
    Page Range: 1-95
    Publication Info: Durham, N.C, Published for the Club by the Seeman Printery, 1889-
  3. By: White, Richard A
    Type: Article
    In: American fern journal
    Volume: 58
    Date: 1968
    Page Range: 108--118
    Publication Info: [Washington, etc.] American Fern Society