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  1. Allgemeine Naturgeschichte für alle Stände / von Professor Oken.
    By: Oken, Lorenz, - Walchner, Friedrich August,
    Publication info: Stuttgart :Hoffmann'sche Verlags-Buchhandlung,1833-4l.
    Contributed by: NCSU Libraries (archive.org)
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  2. Allgemeine Naturgeschichte für alle Stände,
    By: Oken, Lorenz, - Walchner, Friedrich August,
    Publication info: Stuttgart,Hoffman,1833-1841.
    Contributed by: Smithsonian Libraries
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