Work on your vocabulary.    Elementary A1. 

 - London :    Collins,    2013. 
 - 126 pages :    colour illustrations ;    28 cm. 
 - Collins work on your ... .
 - Collins work on your ... .
<br/><br/> "Powered by COBUILD"--cover. 
<br/><br/><label>ISBN: </label>9780007499540 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language -- Textbooks for foreign speakers.<br/>English language -- Grammar -- Problems, exercises, etc.
<br/><br/><label>LC Class. No.: </label>PE1449  / .W67 2013