Spencer, Duncan Hugh. <br/><br/>
English for proficiency / 
D.H. Spencer. 
 - London :  Oxford University Press,  1975. 
 - 176 p. ; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>019432155X (pbk) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreign speakers.
<br/><br/><label>Dewey Class. No.: </label>372.6521 Sp334  / En,2