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陇东黄土高原若干轮作技术方案水保效能评价分析
李锋瑞, 高崇岳
Soil and Water Conservation Efficiencies of several Rotation Patterns on the Loess Plateau of Eastern Gansu
Li Fengrui, Gao Chongyue
生态学杂志 . 1994, (4): 51 -54,60 .