Goursat, Edouard <br/><br/>
Variation of Solutions Partial Differential Equations of the Second Order   
by Edouard Goursat 
 - New York  Dover Publications, Inc.  1964 
 - x, 329p 
 - A Course in Mathematical Analysis, Vol-III, Part-I .
<br/><br/><label>Dewey Class. No.: </label>515.353  / N645