Eco-environment range in the source regions of the Yangtze and Yellow rivers

DING Yongjian, YANG Jianping, LIU Shiyin, CHEN Rensheng, WANG Genxu, SHEN Yongping, WANG Jian, XIE Changwei, ZHANG Shiqing

Journal of Geographical Sciences . 2003, (2): 172 -180 .