URL：https://www.researchgate.net/profile/Benjamin-Vu/publication/264534324/figure/fig1/AS:296010237661189@1447585748419/Provincial-Map-of-Vietnam-Source-the-General-Statistics-Office-of_Q640.jpg
掲載元：https://www.researchgate.net/figure/Regional-Map-of-Vietnam-Source-the-General-Statistics-Office-of-Vietnam_fig2_264534324
