Brockhaus-Enzyklopädie  in 24 Bänden  Band 20  Sci - Sq 

 - Leipzig  Mannheim  Brockhaus  1993 
 - 736 S.  Ill., graph. Darst., Kt. 
<br/><br/><label>ISBN: </label>9783765311000 9783765311208 3765311200 9783765312205 3765312207 9783765310201 3765310204 
<br/><br/><label>Nat. Bib. No.: </label>93,A16,0024  dnb 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>930029739  DE-101