基于改进贸易引力模型的中国植物油料 进口流量及潜力分析Analysis of import flow and potential of China′s plant oilseed based on improved trade gravity model... по 曹冲1,2，袁国军1,2，宋锋华3CAO Chong1,2, YUAN Guojun1,2, SONG Fenghua3

Предметы: “...植物油料进口；影响因素；进口潜力；改进贸易引力模型...”
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