李少青,幸福忠.包头市石拐地区1~7岁儿童接种卡介苗效果监测[J].Chinese journal of Epidemiology,1993,14(5):306 |
包头市石拐地区1~7岁儿童接种卡介苗效果监测 |
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Received:October 20, 1992 Revised:November 20, 1992 |
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