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  1. By: Sheppard, P M
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 48
    Issue: 10
    Date: 1963-12-31
    Page Range: 145--154
    Publication Info: New York,
  2. By: Sheppard, P M - Bishop, J. A.
    Type: Article
    In: The Journal of Research on the Lepidoptera
    Volume: 12
    Issue: 3
    Date: 1973
    Page Range: 135--144
    Publication Info: Arcadia, Calif Lepidoptera Research Foundation