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1999PhDT.........9F Author Comment Author comment for 1999PhDT.........9F:

The full text of this PhD thesis is also available from the author's home institution at the URL http://www.lsw.uni-heidelberg.de/users/sreffert/

Author comment submitted 21-Sep-2000 by Sabine Frink Reffert (sabine@ucsd.edu)