Williams, W. E. (William Elwyn),  <br/><br/>
Partial differential equations 
W. E. Williams. 
 - Oxford Eng., New York, Oxford University Press  Clarendon Press  1980. 
 - 357pages:    24cm 
 - Oxford applied mathematics and computing science series. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0198596332 (pbk.)  6.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Differential equations, Partial