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  1. By: Van Valen, Leigh M. - Wortman, J. L. (Jacob Lawson), - Hill, R S
    Publication info: New York, N.Y, American Museum of Natural History, [1967]
    Holding Institution: American Museum of Natural History Library
  1. By: Hill, R S - Forsyth, S. M. (Steve M.) - Green, F
    Type: Article
    In: Palaeontology
    Volume: 32
    Date: 1989
    Page Range: 287--296
    Publication Info: London, Palaeontological Association, 1957-