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平罗县７０～８０年代中期人口死亡情况比较分析宁夏地方病防治所杨生智银川市妇幼保健院柏学民１９７７年６月我们曾对平罗县１９７４～１９７６年人口死亡情况进行了一次回顾性抽样调查。１０年后于１９８７年１月又对平罗县居民１９８４～１９８６年的死亡情况进行了回...
Pingluo County, the mid-70s to 80s comparative analysis of population death Ningxia endemic disease prevention and cure by Yang Shengzhi Yinchuan City Maternal and Child Health Hospital Bai Xuemin June 1977 we had a death of Pingluo County 1974-1976 a retrospective sample survey . Ten years later, in January 1987, it returned to the death of Pingluo County residents from 1984 to 1986 ...