The secular trend in physical growth of urban North American Negro schoolchildren.
D000293:Adolescent; D001741:Black or African American; D044383:Black People; D001827:Body Height; D001835:Body Weight; D001846:Bone Development; D002648:Child; D002675:Child, Preschool; D005260:Female; D006128:Growth; D006801:Humans; D007866:Leg; D008297:Male; D014481:United States; D014505:Urban Population