TY - Acta Geographica Sinica A1 - T1 - Epidemiological Features and Spatio-temporal Evolution in the Early Phase of the Beijing H1N1 Epidemic Y1 - 2010-03-30 00:00:00.0 JF - Acta Geographica Sinica JO - Acta Geographica Sinica SP - 361 EP - 368 VL - 65 IS - 3 UR - {https://www.geog.com.cn/EN/10.11821/xb201003011} N1 - 10.11821/xb201003011 ER -