Columbia subject headings:
Baltic States--History.
Estonia--History--Soviet occupation, 1940-1941.
Latvia--History--Soviet occupation, 1940-1941.
Lithuania--History--Soviet occupation, 1940-1941.
Harvard subject headings:
Baltic States--Foreign relations.
Baltic States--History--1940-1991.
Baltic States--Politics and government.
Communism--Baltic States.
Estonia--History--Soviet occupation, 1940-1941.
Latvia--History--Soviet occupation, 1940-1941.
Lithuania--History--Soviet occupation, 1940-1941
Princeton subject headings:
Baltic States--History.
Estonia--History--Soviet occupation, 1940-1941.
Latvia--History--Soviet occupation, 1940-1941.
Lithuania--History--Soviet occupation, 1940-1941.