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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Clayton, Dale L
    Type: Article
    In: Journal of the Lepidopterists' Society
    Volume: 58
    Date: 2004
    Page Range: 227--229
    Publication Info: [New Haven, Conn.] Lepidopterists' Society 1959-
  2. By: Clayton, Dale L - Petr, Daniel
    Type: Article
    In: Journal of the Lepidopterists' Society
    Volume: 46
    Date: 1992
    Page Range: 110--118
    Publication Info: [New Haven, Conn.] Lepidopterists' Society 1959-