TY - JOUR A1 - Oswald, Hans A1 - Krappmann, Lothar A1 - Uhlendorff, Harald A1 - Weiss, Karin T1 - Social relationships and support among peers during middle childhood Y1 - 1994 ER - TY - JOUR A1 - Oswald, Hans A1 - Krappmann, Lothar T1 - Social life of children in a former bipartite city Y1 - 1995 ER - TY - JOUR A1 - Krappmann, Lothar A1 - Uhlendorff, Harald A1 - Oswald, Hans T1 - Qualities of Childrenïs Friendships in Middle Childhood in East- and West Berlin Y1 - 1999 SN - 3-11-016500-7 ER -