Agriculture Céréale Elevage Mouton Chèvre Boeuf Jiu dalu Xibu zuowu ji jiachu chuan ru chuqi Zhongguo Beifang sheng ye jingji jiegou de quyu tezheng 旧大陆西部作物及家畜传入初期中国北方生业经济结构的区域特征 = The Regional Features of the Subsistence Economic Structure in North China during the Early Stage after the...