General history of Africa :  I methodology and african prehistory / 
editor J. Ki-Zerbo. 
 - Paris :  UNESCO,  1989. 
 - 349 p. ;  il., map., retrs. 
<br/><br/><label>ISBN: </label>923102588 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>969 =20 HIS Vol. 1