Reprise des installations à la Côte d'or pour la promotion des cultures cacaoyères dans le Protectorat du Cameroun, 1912nnCoopération des Sociétés missionnaires dans la promotion des cultures indigènes, 1913 - 1914nnSituation actuelle et futur développement de l'agriculture dans le Protectorat. - Mémorandum relatif à l'état 1912/13nnn

Wolfgang Zielke, Consul 1967-1969 and Head of the Consulate General of the German Democratic Republic in Tanzania 1977-1979, bequeathed his collection of books on Africa's contemporary history to the ZMO in 2012. From 1952 to 1955, Wolfgang Zielke had studied foreign policy at the Academy of Political and Legal Sciences in Potsdam-Babelsberg. He then worked in the GDR Foreign Ministry as an attaché at the embassy in North Korea, as embassy secretary in the People's Republic of China, Uganda, Ghana, as a legation counsellor and head of the trade mission in Gambia. After the fall of communism, he finally worked as an education officer for African affairs in the social sector until 2003. Wolfgang Zielke is a member of the Association for International Law and Politics (Author: Leibniz-Zentrum Moderner Orient, Bibliothek, Geisteswissenschaftliche Zentren Berlin e.V.).

'Exploratory Expedition to the North-East of the Togo Hinterland (1889 Staff Doctor Dr. Wolf). Report from Imperial Commissioner von Puttkamer to von Bismarck