Hartwig, Gerald W. <br/><br/>
The art of survival in East Africa :  the Kerebe and long-distance trade, 1800-1895. 

 - New York :  African Pub. Co.,  [1976] 
<br/><br/>Bibliography: p. 212-236, includes oral sources. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Kerebe (African people)
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Tanzania -- Commerce -- History.--Tanzania -- Commerce -- History.--Tanzania -- Commerce -- History.