Eddinghaus H.-D <br/><br/>
Numbers 
/ by H.-D.Ebbinghaus 
 - New York  Springer Verlag  1991 
 - 391p. 
<br/><br/><label>ISBN: </label>0387972021 
<br/><br/><label>Dewey Class. No.: </label>512.7  / EBB/N