RT Book T1 Children in cooperation and competition: toward developmental social psychology A1 Pepitone, Emmy Angelica Berger LA English PP Lexington, Mass. u.a. PB Lexington Books YR 1980 UL https://krimdok.uni-tuebingen.de/Record/024954411 CN 155.4/18 SN 0669028428 K1 Kooperation K1 Konkurrenz K1 Soziale Entwicklung K1 Soziale Rolle K1 Gruppendynamik