TY - PROGRESS IN GEOGRAPHY A1 - DAI Yunchuan, LI Diqiang T1 - Overview of connotation, evaluation system, and protection practice of ecological shelters Y1 - 2022-12-28 00:00:00.0 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 1969 EP - 1978 VL - 41 IS - 10 UR - {https://www.progressingeography.com/EN/10.18306/dlkxjz.2022.10.015} N1 - 10.18306/dlkxjz.2022.10.015 ER -