Postage Stamps
- Baccelli, S. "Stampa quotidiana italiana a Modgadiscio, 1929-1969." Africa (Rome) 41, no. 2 (1986): pp. 281-91.
- Fisseha, Girma. "Ethiopian Mesengers in Art and History," in Aspects of Ethiopian Art: From Ancient Axum to the 20th Century. edited by Paul B. Henze, pp. 98-101. London: Jed Press, 1993.
- Lebeuf, Jean-Paul. "Des timbres sur l'art sao." Journal de la Société des Africanistes 34, no. 2 (1964): p. 314.
- Maddocks, R. J and M. P Bratzel. The Postmarks and Postal History of the Cameroons under British Administration, 1916-1961. Windsor, Ont.: MPB Canada, 2007.
Wolff, Rebecca. "Visual Propaganda and Biafran National Identity: Artists Constructing a Nation During Wartime." African Studies Review 67, no. 4 (Dec. 2024): pp. 888-919.