干旱区研究
Changes in Precipitation over Northwest China
REN Guo-yu, YUAN Yu-jiang, LIU Yan-ju, REN Yu-yu, WANG Tao, REN Xiao-yu
Arid Zone Research . 2016, (1): 1 -19 .  DOI: 10.13866/j.azr.2016.01.01