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  1. Nitzsch's Pterylography, tr. from the German. Ed. by Philip Lutley Sclater.
    By: Nitzsch, Christian Ludwig, - Dallas, W. S. - Sciater, Philip Lutley, - Ray Society.
    Publication info: London,Pub. for the Ray society by R. Hardwicke,1867.
    Contributed by: University of California Libraries (archive.org)
    BHL Collections: Charles Darwin's Library
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  2. System der Pterylographie. Nach seinen handschriftlich aufbewahrten Untersuchungen verfasst
    By: Nitzsch, Christian Ludwig, - Burmeister, Hermann,
    Publication info: Halle,E. Anton,1840.
    Contributed by: Field Museum Library
    BHL Collections: Field Museum Library
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