Internal migration and socio-economic development

United Nations Fund for Population Activities, Hanʾguk Inʾgu Pogŏn Yŏnʾguwŏn, In-hyŏn Chʻoe, Korea (South). Kyŏngje Kihoegwŏn. Chosa Tʻonggyeguk, Young-Il Chung, Yong Chan Byun