TY - JOUR A1 - McKee, John P. A1 - Leader, Florence B. T1 - The Relationship of Socio-Economic Status and Aggression to the Competitive Behavior of Preschool Children T2 - Child Development, Vol. 26, (No. 2, June 1955), pp. 135-142. Y1 - 1955 UR - https://opus4.kobv.de/opus4-Fromm/frontdoor/index/index/docId/16098 N1 - Xeroxcopy ER -