composite means for 494 nigerian ibo and yoruba urban and rural boys were lower than means for 208 united states black boys measured during 1974-1977 in richland county , south carolina , by 1.7 cm in standing height , 3.0 kg in body weight , and near 1.5 cm in arm girth and calf girth .
C0041703
united states
C0037716
south carolina