Columbia subject headings:
German reunification question (1949-1990)
Korean reunification question (1945-  )
Vietnamese reunification question (1954-1976)
Harvard subject headings:
German reunification question (1949-1990)
Korean reunification question (1945-)
Vietnamese reunification question (1954-1976)
Princeton subject headings:
German reunification question (1949-1990)
Korean reunification question (1945- )
Vietnamese reunification question (1954-1976)