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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Kessel, Edward L. (Edward Luther), - Kessel, Berta B.,
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 13
    Date: 1937
    Page Range: 58--60
    Publication Info: San Francisco, Pacific Coast Entomological Society,
  2. By: Kessel, Edward L. (Edward Luther), - Kessel, Berta B.,
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 32
    Series: 4
    Date: 1962
    Page Range: 57--78
    Publication Info: San Francisco California Academy of Sciences