An economic history of tropical Africa / 
selected and edited by Z. A. Konczacki and J. M. Konczacki 
 - London :  Frank Cass,  1977- 
 - v. :  maps ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/> The pre-colonial period -  The colonial period  vol. 1.  vol. 2. 
<br/><br/><label>ISBN: </label>0714629197 
<br/><br/><label>LCCN: </label>72-092967 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Africa, Sub-Saharan--Economic conditions