Correspondence and Reports, 1910-1917; Report on the current situation and the most important problems of the Rwanda mission by Missionary Roehl, 27 p., ms., 1913; Conference Protocols, 1928-1938; "Church Mission Society and Bethel Mission in Bukoba von Johanssen, 23 p., ms..., 1929; Discussion with Oldham about division of territory, 1930-1931; Minutes of a meeting of the mission societies working in East Africa on 04.07.1932 in Dresden, 1932; The Jubilee Year of our mission society of H. Scholten, 39 p., ms. 1936; "Gedanken zur Begründung einer Eingeborenenkirche Buhaja von H. Scholten, 19 p., ms., 1938; Gemeindeordnung Buhaja, n.J.; Ordnung der Gemeinde- u. Kirchenvertreter-Versammlung in Buhaja, n.J.; Kirchenzuchtordnung, n.J.; Kartenskizzen, n.J.

Copy of the contract of the Bethel mission with the Belgian Society for Protestant Mission in Congo concerning the mission stations in Rwanda, 1921; translation of letters by Kirinda-Christians, 1925; interpellation to the Friends of the Mission in Rwanda by Miss. Ernst von der Heyden, 16 p., ms., 1931; "My impressions of the missionary work in Rwanda by Insp. Curt Ronicke, 17 p., ms., 1931; reports to the Belgian Society for Protestant Mission in Congo, 1930-1938; "Relations of the Bethel Mission to Rwanda, 26 p., ms., N. N., 1933; "Life story of the Tutsi with the name Mpfizi recorded in Lupembe 1934, 1972 as copy

Correspondence, reports and health reports about the mission members living in Africa, 1926-1938; Instructions and vows, 1928; Pictures from the medical work in Bukobalande, 10 p., ms.., 1929; "Im Auto um den Viktoriasee, 1930; "Aus der Hospitalarbeit in Kamachumu, 1931; "Reise nach Rwanda, 17 S. ms., 1931; "Einer der Reichen im Lande (A funeral celebration), 1934; "Etwas vom Alltag, 19 S., ms., 1934; "Inderpraxis in Afrika, 9 S. ms, 1934; "Ärztliche Mission u. Regierung, 9 S. ms., 1936; "Ärztliche Mission u. Volkstum, 16 S. ms., 1936; decision of the church assembly of Buhaya to give Doctor Kröber the honorary name "Mujunangoma(= saviour of the people), 1937; testimony for Doctor Kröber, 1938; report on the work of Doctor Kröber in the service of the Bethel mission, 1938; correspondence with Doctor Kröber in Kirchen an der Sieg (also in the field) and with his family, 1938-1978; obituary for Maria Kröber, née Augustin, 1978

Correspondence on missionary activity in East Africa; Memorandum "The Relations of the Bethel Mission to Rwanda by Curt Ronicke (?), 26 p., ms., 1932; Reports on Living Conditions in Internment Camps and Letters from Internees, 1939-1944; Settlement of Grants for the Hospital in Bumbuli, 1963

A missionary study on "Leadership and Experience by Ernst Johanssen, conceived by his son-in-law Pastor Gerhard Jasper Sr., about 1940; documents on "Leadership and Experience by Dr. Ernst Johanssen, published after his death by his son-in-law Pastor Gerhard Jasper Sr., including source texts, remarks and correspondence on "Leadership and Experience, Sources on the Relationship of the Bethel Mission and Church Mission Society, Rwanda and the final section

Private letters, 1890-1893; travelogues, diary notes, correspondence with Trittelvitz, 1905-1914; manuscripts, fragments, diaries, etc.: "The first visit of German children to Queen Msinga of Rwanda, "Back to Queen Msinga, "Observations on the Characteristics of Natives, 1907-1908; General Correspondence and Monthly Reports, 1927-1929; Bugufi calls us - Bugufi needs us, 1929; Letter of Native Christians from Bukoba to the Bishop of Central Tanzania, 1929; Impressions and thoughts during a journey into the landscapes of Mischenye u. Karagwe, 1929; Questionnaires with personal data and birth dates of 14 children, 1930; "Church Mission Society u. Bethel-Bielefeld Mission in Bukoba, German and English version by E. Johanssen, 1930; Correspondence with E. Johanssen, 1930-1933; death notice and memorial certificate, 1934; correspondence with Martha Johanssen, 1934-1940; "On the 100th birthday of E. Johanssen, 1964; "On the 100th birthday of E. Johanssen, by J. Busse, with the addition of Albrecht sen.., 1971

Correspondence, circulars, etc.; "Die Berliner Mission in Ostafrika 9 S., ms., N. N., ca. 1943; "The German and non-German Evangelical Missions in German East Africa, Rwanda, Burundi, Cameroon, Togo, German Southwest Africa, ca. 1943; "Brief overview of the Bethel Mission, 5 S. by Curt Ronicke, ca. 1944