00328nam a2200121Ia 4500008004100000082001900041100002600060245002800086250000600114260004700120300000800167650003100175120425s9999    xx            000 0 und d  a 155.5  HUR-A4  a Hurlock, Elizabeth B  a Adolescent development  a4  b McGraw-Hill Book Co. Inc., New Yorkc1973  a427  a Psychology of adolescents