George W. Ernst, Allen Newell. Some issues of representation in a general problem solver. In American Federation of Information Processing Societies: Proceedings of the AFIPS '67 Spring Joint Computer Conference, April 18-20, 1967, Atlantic City, New Jersey, USA. Volume 30 of AFIPS Conference Proceedings, pages 583-600, AFIPS / ACM / Thomson Book Company, Washington D.C., 1967. [doi]
Abstract is missing.