Thomson, A. J. <br/><br/>
Exercises 1, 2 

 - 2nd. ed 
 - Oxford  Oxford University  1980 
 - 2 v 
 - A practical english grammar .
<br/><br/><br/>inglés 
<br/><br/><label>ISBN: </label>0-19-431338-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>/LINGÜISTICA/INGLES-GRAMATICA/REVISADO/