呼图壁县农区奶牛养殖业生态经济系统能值分析

张新田;余晓光;李卫军;杨守国;孙强

Energy Analysis of Ecological-economic System for Dairy Industry in Hutubi Agricultural County

ZHANG Xin-tian;YU Xiao-guang;LI Wei-jun;YANG Shou-guo;SUN Qiang

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