Applied partial differential equations  
Logan, J. David 
 - 2nd ed. 
 - New York :  Springer,  2004 
 - xii, 206 p. :  ill. ;  24 cm. 
 - Undergraduate texts in mathematics .
<br/><br/><label>ISBN: </label>0387209352 (alk. paper) | 0387209530 (pbk. : alk. paper)