title: GENETIC STUDIES AND CHROMOSOMAL ANALYSES IN FAMILIES WITH MONGOLISM (DOWN'S SYNDROME) IN MORE THAN ONE MEMBER.
mesh_terms: D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002875:Chromosomes; D004314:Down Syndrome; D006801:Humans; D012106:Research; D014314:Trisomy
keywords: CHROMOSOME ABNORMALITIES; CHROMOSOMES; MONGOLISM; TRISOMY