禁牧前与禁牧后畜牧业成本差异对比——以宁夏盐池县为例
금목전여금목후축목업성본차이대비——이저하염지현위례
Comparision of Costs Difference of Stockbreeding before and after Prohibiting Herding ——A Case of Yanchi County in Ningxia
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