Hailey
An African survey revised 1956 : a study of problems arising in Africa south of the Sahara / by Lord Hailey
Oxford University Press, 1957
 Buku Teks
Wiedner, Donald L. Donal Lawrence)
A history of Africa south of the Sahara / Donald L. Wiedner
Random House, 1962
 Buku Teks
A Symposium on fertility in sub-sahara Africa
Washington, D.C :Worl bank, 1996.,
 Buku Teks
Africa : journal of the International African Institute
London : Oxford University Press
 Majalah, Jurnal, Buletin
Swift, Jeremy, author
The Sahara
Time-Life Internationa, 1975
 Buku Teks
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