TY - Resources Science A1 - WANG Xiaoqing, PU Lijie T1 - A review of the classification of natural resources Y1 - 2022-01-25 00:00:00.0 JF - Resources Science JO - Resources Science SP - 2203 EP - 2214 VL - 43 IS - 11 UR - {https://www.resci.cn/EN/10.18402/resci.2021.11.05} N1 - 10.18402/resci.2021.11.05 ER -