Lufthansa, Boeing 747, D-ABYD, accident at Nairobi, Kenya, on 20 November 1974. Report No. CAV/ACC/26/74, dated July 1976, released by the Accident Investigation Board, East African Community. Accident Investigation Branch, 1976. Raportin verkkoversio (PDF) (viitattu 23.8.2021). (englanniksi)