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高寒地区近57年无霜期及其积温变化特征
李广文
Frost-free Periods in High-cold Region During 1961-2017: Variation Characteristics and the Accumulated Temperature
中国农学通报 . 2019, (20): 70 -74 .  DOI: 10.11924/j.issn.1000-6850.casb18030053