Epstein, Bernard. <br/><br/>
Partial differential equations :   an introduction 

 - New York :   McGraw-Hill,   1962. 
 - 273 p. 
 - International series in Pure and Applied Mathemati .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECUACIONES DIFERENCIALES
<br/><br/><label>Universal Decimal Class. No.: </label>517.944