Bers,L et al (eds) <br/><br/>
Contributions to the theory of partial differential equations 
Ed by L.Bers et al 
 - Princeton  Princeton University Press  1954 
 - v  257 
 - Annals of mathematics studies 33 .
<br/><br/><label>ISBN: </label>9780691095844 
<br/><br/><label>Dewey Class. No.: </label>515.353  / BER