Gustafson, Karl E. <br/><br/>
Introduction to partial differential equations and hilbert space methods / 

 - New York:  John Wiley,  1980 
 - xv, 270p. Index 
<br/><br/><label>ISBN: </label>0471040894 
<br/><br/><label>Dewey Class. No.: </label>515.35  / G982.IP