TY - GEOGRAPHICAL RESEARCH A1 - XUE Jun-fei T1 - Hierarchical structure and distribution pattern of Chinese urban system based on aviation network Y1 - 2008-01-25 00:00:00.0 JF - GEOGRAPHICAL RESEARCH JO - GEOGRAPHICAL RESEARCH SP - 23 EP - 33 VL - 27 IS - 1 UR - {https://www.dlyj.ac.cn/EN/10.11821/yj2008010003} N1 - 10.11821/yj2008010003 ER -