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  1. By: Hauk, Warren D - Barker, Michael S.
    Type: Article
    In: American fern journal
    Volume: 93
    Date: 2003
    Page Range: 93--94
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Shaw, S W - Sprunt, S V - Barker, Michael S.
    Type: Article
    In: American fern journal
    Volume: 98
    Date: 2008
    Page Range: 107--111
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Barker, Michael S. - Hauk, Warren D
    Type: Article
    In: American fern journal
    Volume: 93
    Date: 2003
    Page Range: 1--19
    Publication Info: [Washington, etc.] American Fern Society
  4. By: Barker, Michael S.
    Type: Article
    In: American fern journal
    Volume: 95
    Date: 2005
    Page Range: 128--129
    Publication Info: [Washington, etc.] American Fern Society
  5. By: Barker, Michael S. - Hickey, R James
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 93
    Issue: 3
    Date: 2006
    Page Range: 371--401
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-