Spencer, D.H.. <br/><br/>
English for Proficiency /  

 - Reprinted 1965 /  
 - London E.C.4 :   Oxford University Press ,   1990 
 - p.184 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proficiency
<br/><br/><label>Dewey Class. No.: </label>P111,9  / K3;3