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