TY - BOOK AU - Iivanainen Matti V TI - A study on the origins of mental retardation T2 - Clinics in developmental medicine SN - 0433163003 AV - WM300 U1 - 616.8/588/071 PY - 1974/// CY - London, Philadelphia PB - Heinemann Medical [for] Spastics International Medical Publications, J.B. Lippincott KW - Mental retardation KW - Diseases KW - Causes and theories of causation KW - Mental Retardation KW - etiology N1 - Includes index; Bibliography: p. 161-168 ER -