TY - Acta Geographica Sinica A1 - LI Xun, XU Xianxiang, CHEN Haohui T1 - Temporal and Spatial Changes of Urban Efficiency in the 1990s Y1 - 2005-07-25 00:00:00.0 JF - Acta Geographica Sinica JO - Acta Geographica Sinica SP - 615 EP - 625 VL - 60 IS - 4 UR - {https://www.geog.com.cn/EN/10.11821/xb200504010} N1 - 10.11821/xb200504010 ER -