1. Alfeld, Louis Edward, and Alan K. Graham, 1976. Introduction to Urban Dynamics, Cambridge, MA: Productivity Press. 333 pp.
2. Bruner, Jerome S., 1963. The Process of Education, New York: Vintage Books.
3. Draper, Frank, 1989. Letter to Jay Forrester. Personal communication, Orange Grove Junior High School, 1911 E. Orange Grove Rd., Tucson, AZ 85718. May 2
4. Eberlein, Robert, 1991. Vensim Reference Manual. IBM PC, DEC VMS, and UNIX workstations. 72 Grafton St., Arlington, MA 02174: Ventana Systems, Inc.
5. Forrester, Jay W., 1958. “Industrial Dynamics-A Major Breakthrough for Decision Makers.” Harvard Business Review, 36(4), 37–66. Also appears in revised form as Chapter 2 in the author’s Industrial Dynamics 1961 and Chapter 1, pp. 1-29, of Collected Papers 1975; also as Chapter 2, pp. 37-65 in Edward B. Roberts (ed.), Managerial Applications of System Dynamics, 1978, all from Cambridge, MA: Productivity Press.