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  1. Katalog der Eiersammlung : nebst Beschreibungen der aussereuropäischen Eier /
    By: Nehrkorn, Adolph
    Publication info: Braunschweig :H. Bruhn,1899.
    Holding Institution: Smithsonian Libraries
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  2. Nachträge zu Nehrkorn's Eierkatalog /
    By: Nehrkorn, Adolph - Nehrkorn, Adolph.
    Publication info: Berlin, [Germany] :R. Friedländer & Sohn,1914.
    Holding Institution: Smithsonian Libraries
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