Columbia subject headings:
Baltic States.
Harvard subject headings:
Baltic States--Annexation to the Soviet Union.
Baltic States--History--Autonomy and independence movements.
Nationalism--Baltic States.
Russification--Baltic States.
Princeton subject headings:
Baltic States--Annexation to the Soviet Union.
Baltic States--History--Autonomy and independence movements.
Nationalism--Baltic States.
Russification--Baltic States.