Dixson, Robert J. <br/><br/>
Graded exercises in English :  a new revised edition / 
by Robert J. Dixson 
 - Rev. ed. 
 - New York :  Regents Publishing Co.,  1971 
 - 182 p. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreigners