Duff, George Francis Denton  1926- <br/><br/>
Partial differential equations / 
by G.F.D. Duff. 
 - Toronto :  University of Toronto Press ,  1956. 
 - x, 248 p. :  ill. ;  24 cm. 
 - Mathematical expositions ;  no. 9 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.
<br/><br/><label>Dewey Class. No.: </label>517.38 DUF