TY - SCIENTIA GEOGRAPHICA SINICA A1 - Li Wang, Wanbo Liu, Dongxia Zhao, Zenglin Han, Xinhui Huang T1 - Spatial Differentiation Characteristics of Advanced Age Population in Northeastern China and Its Driving Factors Y1 - 2019-02-10 00:00:00.0 JF - SCIENTIA GEOGRAPHICA SINICA JO - SCIENTIA GEOGRAPHICA SINICA SP - 267 EP - 276 VL - 39 IS - 2 UR - {http://geoscien.neigae.ac.cn/EN/10.13249/j.cnki.sgs.2019.02.011} N1 - 10.13249/j.cnki.sgs.2019.02.011 ER -