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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Nadel, H
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 63
    Issue: 3
    Date: 1987
    Page Range: 242--246
    Publication Info: San Francisco, Pacific Coast Entomological Society,
  2. By: Roskam, J C - Nadel, H
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 92
    Date: 1990
    Page Range: 778--792
    Publication Info: Washington, etc, Entomological Society of Washington,