Paper on Weiss and Bertalanffy presented at the ISSS 2006 50th annual meeting Stefan Blachfellner vor 20 Jahren 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 Manfred Drack back from Rostock by Stefan Blachfellner 16 Jahren ago Position Paper of the German Cultural Council on the UN Agenda 2030 for Sustainable Development, with contribution of the BCSSS partner Universal Design Forum e.V. by Stefan Blachfellner 8 Jahren ago Paris 2015 | Manfred Drack | Theoretical biology and the organism concept: a historical perspective by Stefan Blachfellner 11 Jahren ago