Alonso Vallecillos, Rogelio <br/><br/>
Spanish grammar drills / 
Rogelio A. Vallecillos 
 - 2nd ed. 
 - New York :  McGraw-Hill,  2012 
 - ix, 357 p. ;  28 cm. 
<br/><br/> Previous ed.: 2007 
<br/><br/><br/>Text in English and Spanish 
<br/><br/><label>ISBN: </label>9780071789479(pbk.) 0071789472 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spanish language--English--Textbooks for foreign speakers<br/>Spanish language--Grammar--Problems, exercises, etc.<br/>Spanish language--Self-instruction