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1996PhDT........68H Author Comment Author comment for 1996PhDT........68H:

The full text of this thesis is also available from the author's home institution at the URL http://www.strw.leidenuniv.nl/~fph/thesis.ps.gz

Author comment submitted 5-Feb-2001 by Frank P. Helmich (F.P.Helmich@sron.rug.nl)