found: Sociaal en Cultureel Planbureau. Afdeling Systeemanalyse. Profijt van de overheid, 1977 (a.e.)t.p. (J. M. M. Ritzen)
found: Lessen in bezuinigen, 1988:t.p. (Prof. dr. ir. J.M.M. Ritzen)
found: Market failure in training, c1991:t.p. (Jozef M.M. Ritzen) t.p. verso (Minister of Education and Science, Govt. of Netherlands)
found: His Wat is onderwijs ons waard? 1983:t.p. (Jo Ritzen)
found: His Methodology for planning technical education, 1975:t.p. (Jozef M. Ritzen)
found: De minister, een handboek, 1998:t.p. (Jo Ritzen) p. 4 cover (b. 1945)