Contact DI Dr. Günther Herdin g.herdin@prof-ges.comMobile: +43 699 10364555Prof. Tusch Strasse 1B/8B A-6200 Jenbach DI Rüdiger Herdin r.herdin@prof-ges.comMobile: +43 699 18179111Mittelgasse 17-19/1/17A-1060 Wien