Friedman, Avner <br/><br/>
Partial differential equations 

 - New York :  Rinehart and Winston,  1969 
 - 262 p. :  il. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECUACIONES DIFERENCIALES
<br/><br/><label>Dewey Class. No.: </label>515.35  / F911