Spatial-temporal changes in vegetation cover and their relationships with precipitation and surface air temperature over the Beijing-Tianjin-Hebei region from 1982 to 2006
YAN Libin, LIU Xiaodong
Ecology and Environment . 2011, (2): 226 -232 .  DOI: 10.16258/j.cnki.1674-5906(2011)02-0226-07

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