Crystal, David,  1941- <br/><br/>
Directions in applied linguistics / 
David Crystal 
 - London :  Academic Press,  1981 
 - 179 p. :  ill. ;  23 cm. 
 - Applied language studies .
<br/><br/><label>ISBN: </label>0121984206 
<br/><br/><label>LCCN: </label>81-66371 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied linguistics