Analysis of seasonal drought variations in Zhangjiakou since 1965
HU Xue, MA Guang, LI Chunqiang, CHE Shaojing, KANG Xiyan, LIU Xingyan
Science & Technology Review . 2019, (20): 40 -48 .  DOI: 10.3981/j.issn.1000-7857.2019.20.005

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