TY - Acta Geographica Sinica A1 - LIU Xianfeng, REN Zhiyuan, LIN Zhihui, LIU Yanxu, ZHANG Donghai T1 - The spatial-temporal changes of vegetation coverage in the Three-River Headwater Region in recent 12 years Y1 - 2013-07-27 00:00:00.0 JF - Acta Geographica Sinica JO - Acta Geographica Sinica SP - 897 EP - 908 VL - 68 IS - 7 UR - {https://www.geog.com.cn/EN/Y2013/V68/I7/897} N1 - ER -