Hellwig, Günter,  1926- <br/><br/>
Partial differential equations :  an introduction / 
Günter Hellwig ; [translator] E. Gerlach. 
 - xiii, 263 pages :  illustrations ;  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial
<br/><br/><label>LC Class. No.: </label>QA374  / .H45513 1964