Heyer, H.  <br/><br/>
lecture Notes in Mathematics  
/ by H. Heyer  
 - Germany   Springer-Verlag   1984 
 - x, 588p. 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>519.2  / HEY/L