EN中文
Analysis of Drought Spatial-temporal Characteristics Based on SPEI in Eastern Region of Gansu in Recent 50 Years
Bo ZHANG, Yao-zong ZHANG, Pei-gui REN, Dong WANG, Yi-fei ZHAO, Shang-wu YANG
SCIENTIA GEOGRAPHICA SINICA . 2015, (8): 999 -1006 .  DOI: 10.13249/j.cnki.sgs.2015.08.999