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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Charlton, Ralph E.
    Type: Article
    In: Entomological news
    Volume: 96
    Date: 1985
    Page Range: 201--204
    Publication Info: [Philadelphia], American Entomological Society, 1925-
  2. By: Beckemeyer, Roy L. - Charlton, Ralph E.
    Type: Article
    In: Entomological news
    Volume: 111
    Date: 2000
    Page Range: 84--96
    Publication Info: [Philadelphia], American Entomological Society, 1925-
  3. By: Kopper, Brian J - Margolies, David C - Charlton, Ralph E.
    Type: Article
    In: Journal of the Lepidopterists' Society
    Volume: 54
    Issue: 3
    Date: 2001
    Page Range: 96--97
    Publication Info: [New Haven, Conn.] Lepidopterists' Society 1959-