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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Roitberg, Bernard D
    Type: Article
    In: Journal of the Entomological Society of British Columbia
    Volume: 85
    Date: 1988
    Page Range: 58--64
    Publication Info: [Victoria, etc.], Entomological Society of British Columbia,
  2. By: Roitberg, Bernard D - Prokopy, Ronald J
    Type: Article
    In: Journal of the New York Entomological Society
    Volume: 90
    Date: 1982
    Page Range: 258--265
    Publication Info: Lawrence, Kan Allen Press [etc.]