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SEASONAL AND ANNUAL CHANGES OF INFECTED SNAILS IN YUNNAN PROVINCE*
Wu Xing~1;Zheng Jiang~2;Li Xiongbing~3;Yang Jingliang~3;Fan Congzhen~1 Yin GuanIin~1;Yang Hui~1;Hua Zhenghui~2;Zhu Hongqing21 The Centre of Research and Control on Schistosomiasis in Yunnan Province 2 Institute of Parasitic Disease;Chinese Academy of Preventive Medicine3 The Station for Control of Schistosomiasis in Eryuan County
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