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The precipitation change analysis in Kailu country in recent 55 years
姜秀萍 张桂英 宋玉红 王丽娟 张 莉 赵慧颖
Chinese Agricultural Science Bulletin . 2011, (1): 275 -278 .  DOI: 10.11924/j.issn.1000-6850.2010-2146