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  1. By: Kula, Robert R
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 12
    Date: 2003
    Page Range: 278--302
    Publication Info: Washington, D.C, International Society of Hymenopterists, [1992-
  2. By: Kula, Robert R - Zolnerowich, Gregory
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 107
    Date: 2005
    Page Range: 78--83
    Publication Info: Washington, etc, Entomological Society of Washington,
  3. By: Kula, Robert R - Zolnerowich, Gregory - Ferguson, Carolyn J.
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 15
    Date: 2006
    Page Range: 251--265
    Publication Info: Washington, D.C, International Society of Hymenopterists, [1992-
  4. By: Kula, Robert R
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 17
    Date: 2008
    Page Range: 138--156
    Publication Info: Washington, D.C, International Society of Hymenopterists, [1992-