TY - Historical Geography Research A1 - T1 - Y1 - 2021-10-14 00:00:00.0 JF - Historical Geography Research JO - Historical Geography Research SP - 14 EP - 21 VL - 41 IS - 3 UR - {https://www.lsdlyj.com.cn/EN/Y2021/V41/I3/14} N1 - ER -