Duff, G. F. D.  1926- <br/><br/>
Partial differential equations / 
G. F. D. Duff. 
 - Toronto :  University of Toronto Press,  c1956 [Reprinted 1962]. 
 - x, 248 p. :  diagrs. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. [244]-245. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.
<br/><br/><label>Dewey Class. No.: </label>517.38  / DUP 1962