Williamson, Kay. <br/><br/>
The Nigerian Rivers Readers Project. 

 - Virginia-US  :   The Linguistic Reporter,   1972. 
 - p. 1-2 
 - Irregular 
 - Vol. 14 no. 6 (Dec. 1972) 
 - The Linguistic Reporter A Newsletter in Applied Linguistics ;   no. 6 .
 - Center fo Applied Linguistics. .
<br/><br/><br/>Inglés.