地理学报
Agricultural drought monitor: Progress, challenges and prospect
Xianfeng LIU, Xiufang ZHU, Yaozhong PAN, Shuangshuang LI, Yanxu LIU
Acta Geographica Sinica . 2015, (11): 1835 -1848 .  DOI: 10.11821/dlxb201511012