Ian N. Sneddon <br/><br/>
Elements of partial differential equations 

 - New York  Dover Publications  2006 
 - vii, 327p.  22x14cm. 
<br/><br/><label>ISBN: </label>9780486498768  1175 
<br/><br/><label>Dewey Class. No.: </label>515.353  / SNE/ELE