Paper on Weiss and Bertalanffy presented at the ISSS 2006 50th annual meeting Stefan Blachfellner 20 years ago At the ISSS 2006 (50th Annual Meeting) a paper by Drack and Apfalter was presented: Is Paul Weiss’ and Ludwig von Bertalanffy’s System Thinking still valid today? Related posts Heinz von Foerster Symposium by Stefan Blachfellner 19 years ago Commoning and Business Process Management by Stefan Blachfellner 8 years ago Karin Huber-Heim invited to expert panel on circular urban-rural relationships by Stefan Blachfellner 7 years ago