Webster, Gordon  Arthur <br/><br/>
Partial differential equations of mathematical physics 
by Arthur Gordon webster and edited by Samuel J. Plimpton 
 - \\  2nd Corrected Edition 
 - New York  Dover Publications, Inc.  1955 
 - vii,440p.diagrs., tables 
<br/><br/><label>LC Class. No.: </label>QA 401