TY - BOOK AU - Kohn, Martin TI - Social competence , symptoms , and underachievement in childhood : a longitudinal perspective SN - 0470991518 AV - BF721.K64 PB - V.H. Winston KW - Child psychology - Longitudinal studies KW - Child mental health KW - Mentally ill children KW - Underachievers KW - Social skills KW - BF N1 - Bibliography: p. 268-279 ER -