TY - Acta Geographica Sinica A1 - WANG Wulin, WANG Chengjin T1 - Research of China-EU trade based on the Northern Sea Route Y1 - 2021-07-25 00:00:00.0 JF - Acta Geographica Sinica JO - Acta Geographica Sinica SP - 1105 EP - 1121 VL - 76 IS - 5 UR - {https://www.geog.com.cn/EN/10.11821/dlxb202105005} N1 - 10.11821/dlxb202105005 ER -