TY - PROGRESS IN GEOGRAPHY A1 - ZHENG Haixia, FENG Zhiming, YOU Songcai T1 - A Study on Potential Land Productivity Based on GIS Technology in GANSU Province Y1 - 2003-07-24 00:00:00.0 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 400 EP - 408 VL - 22 IS - 4 UR - {https://www.progressingeography.com/EN/10.11820/dlkxjz.2003.04.008} N1 - 10.11820/dlkxjz.2003.04.008 ER -