Wang, Yanchao
Liu, Yu
Funding for this research was provided by:
The State Key Laboratory of Loess and Quaternary Geology (SKLLQG1420)
higher education scientific and technology research project in Hebei province (BJ201602, ZD2016206)
National Basic Research Program of China (2013CB955903)
Natural Science Foundation of Hebei Province (D2016108005)