Gratian Vas <br/><br/>
Prepositions :  [an extensive collection of prepositions and their proper usage] / 
Gratian Vas 
 - Petaling Jaya, Selangor :  Unipress Publ.,  2006 
 - 148 p. ;  22 cm. 
 - Enrich your grammar .
<br/><br/><label>ISBN: </label>9833733565 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Prepositions