Draper, Michael I. (1999). Shadows: Airlift and Airwar in Biafra and Nigeria 1967–1970. Aldershot, UK: Hikoki Publications. ISBN1-902109-63-5.
Gann, Harry (1999). Douglas DC-6 and DC-7. Airliner Tech. Vol.4. North Branch, Minnesota, USA: Speciality Press. ISBN1-58007-017-5.
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