EN中文
The Spatial and Temporal Characteristics of Grassland Degradation in the Three- River Headwaters Region in Qinghai Province
LIU Jiyuan, XU Xinliang, SHAO Quanqin
Acta Geographica Sinica . 2008, (4): 364 -376 .  DOI: 10.11821/xb200804001