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  1. By: Hubbs, Clark
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 38
    Issue: 9
    Date: 1953-11-25
    Page Range: 113--136
    Publication Info: New York,
  2. By: Hubbs, Clark
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 38
    Series: 4
    Date: 1970
    Page Range: 289--297
    Publication Info: San Francisco California Academy of Sciences