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  1. By: Waddington, Janet, - Collins, Desmond. - Von Bitter, Peter H. - Royal Ontario Museum.
    Publication info: Toronto, Royal Ontario Museum, 1978
    Holding Institution: Royal Ontario Museum
  1. By: Briggs, Derek E. G. (Derek Ernest Gilmor), - Collins, Desmond.
    Type: Article
    In: Palaeontology
    Volume: 31
    Date: 1988
    Page Range: 779--798
    Publication Info: London, Palaeontological Association, 1957-