(c) by Walter Papentin 2015
Törpin 13 D-17111 SAROW/Germany Tel. +49 152 33760052 e-mail: pratzel@toerpiner-forum.de internet: http://toerpiner-forum.de
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Helmut G. Pratzel
M. D. habil. D. Sc. Diplom-Chemist  Akademic Director a. D.
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