干旱区研究
Quantitative Estimation of Ecological Assets in Farming-pasturing Ecotone Based on Remote Sensing and GIS—A Case Study in Yanchi County, Ningxia
ZHANG Chao, ZHANG Jian-ming, WANG Peng-long, ZHANG Chun-mei
Arid Zone Research . 2013, (2): 356 -363 .