TY - PROGRESS IN GEOGRAPHY A1 - DUAN Xiaofeng,XU Xuegong T1 - Emergy Analysis for Sustainable Development of Resources-Environment-Economy System in the Yellow River Delta Y1 - 2006-01-25 00:00:00.0 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 45 EP - 55 VL - 25 IS - 1 UR - {https://www.progressingeography.com/EN/10.11820/dlkxjz.2006.01.005} N1 - 10.11820/dlkxjz.2006.01.005 ER -