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  1. New Genera of Angarosphecinae: Cretosphecium from Early Cretaceous of Mongolia and Eosphecium from Early Eocene of Canada (Hymenoptera: Sphecidae)
    By: Pulawski, Wojciech J - Rasnitsyn, Alexandr P - Brothers, Denis J - Archibald, S Bruce
    Type: Article
    In: Journal of Hymenoptera research.
    Volume: 9
    Date: 2000
    Page Range: 34--40
    Publication info: Washington, D.C. :International Society of Hymenopterists,[1992-
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