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

 - New York:  Springer-Verlag,  1971. 
 - viii,221p.:  ill.;  26cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, partial
<br/><br/><label>LC Class. No.: </label>QA371.J6