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  1. Botanik.
    By: Mildbread, Johannes, - Adolf Friedrich, - Hamburgische Wissenschaftliche Stiftung.
    Publication info: Leipzig :Klinkhardt & Biermann,1922.
    Contributed by: Gerstein - University of Toronto (archive.org)
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  2. Ergebnisse der zweiten Deutschen Zentral-Afrika-Expedition 1910-1911 : unter führung Adolf Friedrichs, Herzogs zu Mecklenburg.
    By: Deutsche Zentralafrika-Expedition - Adolf Friedrich,
    Publication info: Leipzig,Klinkhardt & Biermann,1913-1922.
    Contributed by: American Museum of Natural History Library
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  3. In the heart of Africa, by the Duke Adolphus Frederick of Mecklenburg, tr. by G.E. Maberly-Oppler. With maps and numerous illustrations.
    By: Adolf Friedrich, - Maberly-Oppler, G. E.
    Publication info: London, New York [etc.] :Cassell and company, ltd.,1910.
    Contributed by: University of California Libraries (archive.org)
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  4. Wissenschaftliche ergebnisse der Deutschen Zentral-Africa-Expedition, 1907-1908 : unter Führung Adolf Friedrichs, herzogs zu Mecklenburg.
    By: Adolf Friedrich,
    Publication info: Leipzig :Klinkhardt & Biermann,1910-
    Contributed by: MBLWHOI Library
    BHL Collections: MBLWHOI Library, Woods Hole
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  5. Wissenschaftliche Ergebnisse der zweiten Deutschen Zentral-Afrika-Expedition, 1910-1911, unter Führung Adolf Friedrichs.
    By: Hamburgische Wissenschaftliche Stiftung. - Deutsche Zentral-Afrika-Expedition (2nd : 1910-1911) - Adolf Friedrich,
    Publication info: Leipzig,Klinkhardt & Biermann1913-1925.
    Contributed by: MBLWHOI Library
    BHL Collections: MBLWHOI Library, Woods Hole
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