Author comment for 2000MsT...........S:
The full text of this thesis is also available from the author's
home institution at the URL
https://astro.uni-tuebingen.de/publications/diplom/schuh-dipl.ps.gz
Author comment submitted 10-Sep-2003 by Sonja Landenberger Schuh
(schuh@astro.physik.uni-goettingen.de)