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  1. By: Ross, Alan
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 48
    Issue: 9
    Date: 1977
    Page Range: 18--23
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  2. By: Timme, Stephen L. - Ross, Alan
    Type: Article
    In: Evansia
    Volume: 14
    Issue: 4
    Date: 1997
    Page Range: 131--132
    Publication Info: Springfield, Mo American Bryological and Lichenological Society c1984-