3CHENG Xiao-hui1,LIU Jun2 1.Xingtai Meteorological Bureau in Hebei Province,Xingtai 054000,China,2.Observation and Network Department,Hebei Meteorological Bureau,Shijiazhuang 050021,China.Analysis on Change Trend of Sunshine Hours in Xingtai Area in Recent 40 Years[J].Meteorological and Environmental Research,2011,2(10):17-19.
