Das, Sambit <br/><br/>
IELTS:  international English Language Testing System / 
by Sambit Das 
 - Hyderabad :  Paras Medical Publisher,  2005. 
<br/><br/><label>ISBN: </label>8181911288  RS 225 
<br/><br/><label>Subjects--Index Terms: </label>English Language - Usage 
<br/><br/><label>Dewey Class. No.: </label>428.43