found: His Die Entwicklung der Technik, 1972.
found: UMPLIS, Entwicklung eines Umwelt-Planungs-Informationssystems, 1980:t.p. (Horst W. J. Rittel) verso of t.p. (Prof. of Science of Design, Univ. of California, Berkeley, Calif.; Institut f. Grundlagen der Planung, Univ. Stuttgart)
found: The universe of design, 2010:ECIP t.p. (Horst Rittel) galley (U. Cal. professor; work encompases fields such as chemistry, artificial intelligence, theory of technology, and information theory; d. 1990 a few days before 60th birthday)
found: Wikipedia, viewed Nov. 24, 2009(Horst Rittel; Horst Wilhelm Jakob Rittel; b. July 14, 1930, Berlin; d. July 9, 1990, Heidelberg; 1963-1990, prof. of science of design; also with Wash. U., St. Louis, Mo. and U. Stuttgart)