RT Journal Article SR Electronic T1 GENETIC STUDIES IN MENTAL SUBNORMALITY Part I. Familial idiopathic severe subnormality: the question of a contribution by X-linked genes JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 120 OP 120 DO 10.1136/jnnp.37.1.120-b VO 37 IS 1 A1 R. T. C. Pratt YR 1974 UL http://jnnp.bmj.com/content/37/1/120.3.abstract AB