钱映琫,李新达,许正炜,黄蓉娜.成都市1991~1995年以乡为单位儿童免疫接种率达85%效果研究[J].Chinese journal of Epidemiology,1997,18(4):204 |
成都市1991~1995年以乡为单位儿童免疫接种率达85%效果研究 |
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Received:April 14, 1997 Revised:May 10, 1997 |
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