TY - BOOK AU - KOHN, Martin TI - Social competence,symptoms and underachievement in childhood : a longlitudinal perspective U1 - 155.418 K93S PY - 1977/// PB - Washington KW - CHILD PSYCHOLOGY -- LONGITUDINAL STUDIES KW - CHILD MENTAL HEALTH KW - MENTALLY ILL CHILDREN KW - UNDERACHIEVERS ER -