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  1. Collembola, Neuoptera, Hymenoptera, Rhynchota, bearbeitet von R. und H. Heymons und Th. Kuhlgatz.
    By: Heymons, Richard, - Heymons, H. - Kuhlgatz, Theodor,
    Publication info: Jena,G. Fischer,1909.
    Holding Institution: Smithsonian Libraries
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