Qian Ding,Hua Shao,Xi Chen,张弛. Observations of soil organic carbon content and density under the impervious surfaces areas (ISA) of mainland China. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2022. https://cstr.cn/CSTR:11738.11.ncdc.nieer.db1991.2022.