African kingdoms :  an encyclopedia of empires and civilizations / 
Saheed Aderinto, editor 
 - London :  ABC-CLIO,  2017 
 - (363 p.) 
<br/><br/><label>ISBN: </label>978-1-61069-579-4 
<br/><br/><label>Dewey Class. No.: </label>960.2