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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Halstead, Bruce W - Schall, Donald W
    Type: Article
    In: Pacific science
    Volume: 10
    Issue: 1
    Date: 1956
    Page Range: 103--109
    Publication Info: Honolulu, University Press of Hawaii,
  2. By: Halstead, Bruce W - Bunker, Norman C
    Type: Article
    In: Zoologica : scientific contributions of the New York Zoological Society
    Volume: 39
    Issue: 6
    Date: 1954-08-16
    Page Range: 61--77
    Publication Info: New York,