Copson, E. T.  1901- <br/><br/>
Partial differential equations 
E. T. Copson 
 - Cambridge  New York  Cambridge University Press  1975 
 - vii, 280 p.  24 cm 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial
<br/><br/><label>Dewey Class. No.: </label>515  / .353