TY - PROGRESS IN GEOGRAPHY A1 - T1 - Y1 - 1985-12-25 00:00:00.0 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 8 EP - 12 VL - 4 IS - 4 UR - {https://www.progressingeography.com/EN/10.11820/dlkxjz.1985.04.002} N1 - 10.11820/dlkxjz.1985.04.002 ER -