Gregersen, Edgar A. <br/><br/>
Language in Africa :  an introductory survey / 
Edgar A. Gregersen 
 - New York :  Gordon and Breach Science Publishers,  1977 
 - xvii, 237 p. :  ill. ;  24 cm. 
<br/><br/>p. 215-226. 
<br/><br/><label>ISBN: </label>0677043805 
<br/><br/><label>LCCN: </label>72-078389 
<br/><br/><label>Subjects--Topical Terms: </label><br/>African languages