Abstract
吕宝成.流行病学基本方法:Ⅳ.基本衡量和比较衡量[J].Chinese journal of Epidemiology,1989,10(4):249-252
流行病学基本方法:Ⅳ.基本衡量和比较衡量
  
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吕宝成 华北煤炭医学院 
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