Friedrichs, K.O <br/><br/>
Kurt otto friedrichs  selecta, Vol. 2 
K.O. Friedrichs 
 - Boston  Birkhauser-Verlag  1986 
 - 608 
 - Contemporary mathematicians .
<br/><br/><label>ISBN: </label>37643332697 
<br/><br/><label>Dewey Class. No.: </label>21  / FRIE