
宁夏盐池牧业生产系统的研究
A STUDY OF THE PRODUCTION SYSTEM OF ANIMAL HUSBANDRY IN YANCHI COUNTY, NINGXIA
系统分析 / 灰色关联度 / 牧业生产系统 {{custom_keyword}} /
system analysis / degree of grey connection / production system of animal husbandry. {{custom_keyword}} /
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