Columbia subject headings:
Korea (North)--Foreign relations--Korea (South)
Korea (South)--Foreign relations--Korea (North)
Korean reunification question (1945- )
Harvard subject headings:
Korea (North)--Foreign relations--Korea (South)
Korea (South)--Foreign relations--Korea (North)
Korean reunification question (1945-  )
Princeton subject headings:
Korea (North)--Foreign relations--Korea (South)
Korea (South)--Foreign relations--Korea (North)
Korean reunification question (1945- )