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In the heart of Africa

Adolf Friedrich, Duke of Mecklenburg-Schwerin, 1873-1969, Maberly-Oppler, G. E, Deutsche Zentral-Afrika-Expedition (1907-1908), Russell E. Train Africana Collection (Smithsonian Libraries) DSI · 1910 · London ; New York : Cassell and company, ltd. · 9 pictures

Scientific expeditions

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