The characteristics and changing tendency of permafrost in the source regions of the Datong River, Qilian Mountains
WANG Shengting, SHENG Yu, WU Jichun, LI Jing, CHEN Ji
JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY . 2015, (1): 27 -37 .  DOI: 10.7522/j.issn.1000-0240.2015.0003