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  1. By: Roberts, H. Radclyffe
    Publication info: 1935-1950
    Holding Institution: Academy of Natural Sciences of Drexel University, Library and Archives
  1. By: Roberts, H. Radclyffe - Carbonell, Carlos S.
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 43
    Series: 4
    Date: 1982-11-04
    Page Range: 43--58
    Publication Info: San Francisco California Academy of Sciences