Knutzen V K, Bourne D E
S Afr Med J. 1977 Mar 19;51(12):392-4.
Four sociogeographical groups of Xhosa were studied to show differences in their reproductive efficiencies. The rural groups showed increased perinatal, infant and over-all death rates compared with the urban groups. The highest death rate in all groups was during the infant period. The infant mortality was about 25% among the rural groups and 10% among the urban groups.
对科萨人的四个社会地理群体进行了研究，以显示其生殖效率的差异。与城市群体相比，农村群体的围产期、婴儿期和总体死亡率有所上升。所有群体中死亡率最高的是婴儿期。农村群体的婴儿死亡率约为25%，城市群体为10%。
