Webster, A. G. <br/><br/>
Partial differential equations of mathematical physics 

 - 2nd 
 -  Dover Publishers  1955 
 - vii, 440p. 
<br/><br/> <br/> 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equqtions<br/>Mathematical physics
<br/><br/><label>Dewey Class. No.: </label>530.15 W391p