Nagel, Alexader. <br/><br/>
Lectures on pseudo-differential operartors  regularity theorems and applications to non-elliptic problems 
by Alexander Nagel, E.M. Stein 
 - New Jersey  Princeton University Press  1979 
 - 159p. 
<br/><br/><label>Dewey Class. No.: </label>515.72  / N79