RT Article T1 Parent-referred problem three-year-olds: follow-up at school-entry JF The journal of child psychology and psychiatry VO 27 IS 1986$h4 SP 473 OP 473 A1 Campbell, Susan B. 1956- LA English YR 1986 UL https://krimdok.uni-tuebingen.de/Record/1628236337 K1 Verhaltensstörungen