Zachmanoglou, E.C.  <br/><br/>
Introduction to Partial Differential Equations with Applications 
Zachmanoglou, E.C. & Thoe,Dale W. 
 - New York  Dover  1976 
 - 391  Illustration,index & reference 
<br/><br/><label>ISBN: </label>486652513 
<br/><br/><label>Dewey Class. No.: </label>515  / Z12