The Cambridge history of Africa.  Vol. 2,  From c. 500 BC to AD 1050 / 
edited by J. D. Fage. 
 - Cambridge :  Cambridge University Press,  1988. 
 - xvii, 840p. 
<br/><br/><label>ISBN: </label>0521215927 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Africa--History.