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2. Anon 1972. Jay W. Forrester, 1918–. Excerpt from the 1972 IEEE Annual Banquet Brochure, downloaded from www.ieee.org/web/aboutus/history_center/biography/forrester.html [20 July 2007].
3. Conversation: Jay W. Forrester
4. 1990a. The Beginning of System Dynamics. System Dynamics Society: Albany, NY.