[Symposium. Variation in chromosomes in human populations. 3. A survey of sex chromatin abnormalities in mentally defective children].
D002648:Child; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007361:Intelligence Tests; D008297:Male; D012728:Sex Chromatin