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 Register now! 2018 NSF Design Circle Workshop: Designing and Developing Global Engineering Systems, Oregon, USA by Stefan Blachfellner 8 years ago Presentation at the International Sociological Association’s Research Committee on Sociocybernetics by Stefan Blachfellner 17 years ago 20th – 23rd January 2018. INCOSE International Workshop, Jacksonville, Florida, USA by Stefan Blachfellner 8 years ago