Bers, L., et al <br/><br/>
Partial differential equations 
L. Bers, et al 
 - Providence  American Mathematical Society  1964 
 - xv  343 
 - Lectures in applied mathematics 3A .
<br/><br/><label>ISBN: </label>9780821800492 
<br/><br/><label>Dewey Class. No.: </label>10.02  / BER