title: MONGOLOIDS, THEIR MOTHERS AND SIBSHIPS.
mesh_terms: D044466:Asian People; D001699:Biometry; D001722:Birth Order; D004314:Down Syndrome; D005826:Genetics, Medical; D006801:Humans; D009035:Mothers; D012723:Sex; D013223:Statistics as Topic
keywords: BIRTH ORDER; GENETICS, HUMAN; MONGOLISM; SEX; STATISTICS