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Hymenoptera of America north of Mexico no.2

Parts

  1. By: Muesebeck, C F W - Krombein, Karl V. - Townes, Henry
    Type: Article
    In: Hymenoptera of America north of Mexico : synoptic catalog
    Volume: 2
    Date: 1951
    Page Range: 1--1420
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1951