Change trends of sunshine duration over the 50 Years from 1959 to 2008 in Shanxi province, China
HAO Zhiwen, FAN Xiaohui, ZHU Xiaoqi, MA Jianping,WANG Mengben
Ecology and Environment . 2009, (5): 1807 -1811 .  DOI: 10.16258/j.cnki.1674-5906(2009)05-1807-05

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