Copson, E. T. , <br/><br/>
Partial differential equations 
by E. T. Copson. 
 - Cambridge  Cambridge University Press  1975. 
 - vii, 280 pages ;    24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 277. 
<br/><br/><label>ISBN: </label>0521205832 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial