Coughlan, Robert
Tropical Africa
Time Incorporated, 1962
 Buku Teks
The demography of tropical Africa
by William Brass ... [et al.]
Princenton University Press, 1968
 Buku Teks
Marcus, Edward
Investment and development possibilities in tropical Africa
Bookman Associates, 1960
 Buku Teks
Due, John F.
Taxation and economic development in tropical Africa
MIT Press, 1963
 Buku Teks
Browne, G.S.
Europe Africa world population
F.W. Chesire, 1960
 Buku Teks