Correspondence and technical drawings, 1912-1914; Correspondence, 1926-1928; Advertising leaflet for "Ufalme wa Mungu (in English: God's Kingdom) as print, 1927; "The development of the mission printing plant in Wuga in connection with its latest requirements - a key note by Curt Ronicke, 1928; "How do your printed materials develop - A walk through the operation of the mission printing plant in Vuga, 12 p., print with Fig., 1932".
Evangelical Missionary Society for German East AfricaCurriculum Vitae of Otto and Lydia Milk, née Grüber, 1938; Ordination Certificate, Instruction, Vow of Deputation, 1938; Correspondence for Exams and for Employment, 1938; Address by Praeses Koch at the Ordination of Otto Milk and Hassenpflug, 1938; "Der Missions Gedanken bei Vater Bodelschwingh von cand. theol. Otto Milk, 26 S. ms.., about 1937; correspondence and letters of friendship, 1938-1939; correspondence with the Milk couple during their internment, 1940-1947; correspondence during their work in Wupperthal with Clan-william in Kapland (South Africa), Keetmanshoop and Okahandja (Southwest Africa), also annual reports and Letters from Friends, 1948-1954; Letters and reports from the Paulinum in Karibib and Otjimbingue, especially from Singwochen, 1955-1966; "Omahungi (ein Gemeindeblatt), Druck, 1955-1958; 25 letters of thanks from Paulinum students to Pastor Curt Ronicke, 1958; Korrespondenz zur Altersversorgung der Eheleute Milk, 1937-1970
Evangelical Missionary Society for German East Africa