The biological significance of mongolism.
D000017:ABO Blood-Group System / Q000032:analysis; D002869:Chromosome Aberrations / Q000235:genetics; D025063:Chromosome Disorders; D002904:Chromosomes, Human, 21-22 and Y; D003460:Crystallization; D003878:Dermatoglyphics; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis / Q000209:etiology; D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008214:Lymphocytes / Q000032:analysis; D008423:Maternal Age; D009030:Mosaicism; D014314:Trisomy
D000017:ABO Blood-Group System