EN中文
Review of Study on Vegetation Cover Change in the Lower Reaches of Heihe River in Nor thwest Ar id Ar ea
JIA Yanhong,ZHAO Chuanyan,NAN Zhongren
PROGRESS IN GEOGRAPHY . 2007, (4): 64 -74 .  DOI: 10.11820/dlkxjz.2007.04.009