Columbia subject headings:
Harvard subject headings:
Korea (North)--Foreign relations--Korea (South)
Korea (South)--Foreign relations--Korea (North)
Korea (South)--Politics and government--2002-
Korean reunification question (1945- )
Princeton subject headings:
Korea (North)--Foreign relations--Korea (South)
Korea (South)--Foreign relations--Korea (North)
Korea (South)--Politics and government--2002-
National security--Korea (South)
World politics--21st century.