Gupta, R <br/><br/>
Joint CSIR-UGC  (NET) mathematical sciences part-a,b & c/ 

 - New Delhi:  Ramesh,  2015. 
 - 240 p. 
<br/><br/><label>ISBN: </label>978817122649 
<br/><br/><label>Dewey Class. No.: </label>510  / GUP/J