TY - PROGRESS IN GEOGRAPHY A1 - Zhao Mingcha T1 - THE ENVIRONMENT QUALITY AND THE ANALYSIS OF OBSTACLE FACTORS OF SUSTAINABLE DEVELOPMENT IN SOUTH QINGHAI Y1 - 1998-12-24 00:00:00.0 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 27 EP - 34 VL - 17 IS - 4 UR - {https://www.progressingeography.com/EN/10.11820/dlkxjz.1998.04.004} N1 - 10.11820/dlkxjz.1998.04.004 ER -