民国时期东北地区克山病流行的时空特征与环境因素

龚胜生, 刘晓峥, 贾珂

Spatio-temporal characteristics and environmental factors of Keshan disease in Northeast China in 1912-1949

GONG Shengsheng, LIU Xiaozheng, JIA Ke

图2 1912—1949年民国时期东北地区克山病广度逐年变化

Fig. 2 Annual changes in the extent of Keshan disease in Northeast China in 1912-1949