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  1. Der Hund.
    By: Walther, Friedrich L.
    Publication info: Giessen :G.F. Heker,n.d..
    Contributed by: Cambridge University Library
    BHL Collections: Charles Darwin's Library
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  2. Der Hund. : [Supplementary material in Charles Darwin's copy].
    By: Darwin, Charles, - Walther, Friedrich L.
    Contributed by: Cambridge University Library
    BHL Collections: Charles Darwin's Library
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