Smith, Robert Sydney. <br/><br/>
Kingdoms of the Yoruba / 
Robert Smith. 
 - 2d ed. 
 - London [New York] :  Methuen distributed by Harper and Row,  1976. 
 - xvi, 266 p. :  maps ;  19 cm. 
 -  2 .
<br/><br/> Bibl. p. [245]-256. Includes index.