Spatial-temporal changes of climate and vegetation cover in the semi-arid and arid regions of China during 1982－2006
LI Junyuan, XU Weixin, CHENG Zhigang, LIU Yan, LIU Zhao
Ecology and Environmental Sciences . 2012, (2): 268 -272 .  DOI: 10.16258/j.cnki.1674-5906(2012)02-0268-05

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