information...this article is a more complete, improved version of the
Preprint Nr.604/11/93 Bielefeld Univesity (BiBoS).
The LaTeX file is compatible with: EmTex version 3.0 [3a], LaTeX version 2.09,
TCI LaTeX.
The actual LaTeX file (placed in the "BODY" case) has the checksum
value = 4246  130 (obtained by the checksum  command 'sum' from
UNIX System V/386 Release 3.2)
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