Warfield's talk was given on 4 April 1990. The Spanish title for this conference was: "Cuarto Simposium Internacional de Ingeniera Industrial y de Sistemas" Also with the manuscript in the file folder is "Table 1, Overview of Origins and Significance of 12 laws of Generic Design, February 1990." which presents some of the talk in matrix format Warfield probably used it as a handout, or an overhead transparency. SEE ALSO the title "Twelve Laws of Design Science (transparencies)" in this Access Database. The organizing committee for the S.L. Potosi conference consisted of Senor Vicente Ruiz R. and Senor Jose Manuel Guerra. Warfield stayed at El Hostal del Quijote, in S.L. Potosi. Elements from this paper were later incorporated by Warfield into a longer, better paper titled "Generic Planning: Research Results and Applications" which was the paper written for the Nov. 1990 Von Stichting conference in Amsterdam, and eventually published under the latter title.