C. F. Graumann (Ed.). Denken (Thinking), 1st ed., 1965; 5th ed., 1971. Pp. 513; Hans Thomae (Ed.). Die Motivation des menschlichen Handelns (Motivation of Human Behavior). 1st ed., 1965; 7th ed., 1971. Pp. 539; Otto M. Ewert (Ed.). Entwicklungspsychologie (Developmental Psychology), Vol. 1, 1972. Pp. 364; Franz Weinert (Ed.). Pädagogische Psychologie (Educational Psychology). 1st ed., 1967; 7th ed., 1972. Pp. 600; and Gisella Ullmann (Ed.), Kreativitätsforschung (Research on Creativity). 1973. Pp. 391. Cologne, Germany: Kiepenhauer & Witsch