Nagel, Alexander <br/><br/>
Lectures on pseudo differential operators; regularity theorems and applications to non-elliptic problems  / 

 - New Jersey:  Princeton University Press,  1979 
 - 159p. 
 - Mathematical notes   no. 24 .
<br/><br/><label>Dewey Class. No.: </label>515.35  / N147.LP