Columbia subject headings:
Harvard subject headings:
Choe, Dok Sin.
Korea (North)--Description and travel.
Korea (North)--Politics and government.
Korea (South)--Politics and government.
Korean reunification question (1945- )
Princeton subject headings:
Ch'oe, Tŏk-sin, 1914-1989--Exile--Korea (North).
Diplomats--Korea (South)--Biography.
Korea (North)--Social conditions.