AN EMPIRICAL-ANALYSIS OF LEONTIEF PARADOX IN THE UNITED-STATES FOOD AND FIBER TRADEC LEE, D WILLSAMERICAN JOURNAL OF AGRICULTURAL ECONOMICS(1987)引用 0|浏览1暂无评分AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要