EN中文
Analysis of four seasons and their length changes in Hexi area in recent 55 years
ZHANG Ke-xin, LIU Pu-xing, ZHANG Rui, HUO Hua-li, CAO Li-guo
GEOGRAPHICAL RESEARCH . 2011, (3): 547 -554 .  DOI: 10.11821/yj2011030016