John, Fritz.. <br/><br/>
Partial differential equations 

 - 4th ed. 
 - New York:  Springer-Verlag,  1982. 
 - x, 249 p. :  ill;  25cm. 
 - Applied mathematical sciences ;   v. 1. .
<br/><br/> Includes index.  
<br/><br/><label>ISBN: </label>9788184892130 
<br/><br/><label>Dewey Class. No.: </label>515.353    / JOH