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  1. By: Budd, Ann F. - Guzman, Hector M.
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 107
    Date: 1994
    Page Range: 591--599
    Publication Info: Washington Biological Society of Washington
  2. By: Budd, Ann F. - Bosellini, Francesca R - Stemann, Thomas A
    Type: Article
    In: Palaeontology
    Volume: 39
    Date: 1996
    Page Range: 515--560
    Publication Info: London, Palaeontological Association, 1957-