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Climatic index and risk analysis of winter freezing injury for winter wheat in Hebei.
DAI Li-qin1,2**, KANG Xi-yan1,2, YAO Shu-ran1,2, Li Chun-qiang1,2, YU Chang-wen3, WANG Meng4
cje . 2014, (8): 2046 -2052 .