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 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/21976 SN - 3-11-016500-7 ER -