Estein, Benard <br/><br/>
Partial Differential equations: An introduction 

 - Bombay  Tata McGraw-Hill  1962 
 - ix, 273 p. 
<br/><br/><label>ISBN: </label> RS17.25 
<br/><br/><label>Dewey Class. No.: </label>515.353 E85P