Analysis on Trends in Annual Reference Crop Evapotranspiration and its Impact Climatic Factors in Henan Province During 1971 to 2010
JI Xing jie，ZHU Ye yu，GU Wan long
Chinese Journal of Agrometeorology . 2013, (01): 14 -22 .  DOI: 10.3969/j.issn.1000-6362.2013.01.003