The Historiography of Southern Africa :  Proceedings of the experts meeting held at Gaborone, Botswana, from 7 to 11 march 1977 / 
L. D. Ngcongco...(et al.) 
 - Paris :  UNESCO,  1980. 
 - 112 p. 
 - The General history of Africa: Studies and documents ;  4. .
<br/><br/><label>ISBN: </label>9231017756 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>930.2 (68) =20 HIS No. 4