Columbia subject headings:
Baltic States--Foreign relations--Europe.
Europe--Foreign relations--Baltic States.
National security--Baltic States.
North Atlantic Treaty Organization.
Harvard subject headings:
Baltic States--Foreign relations--Europe.
Europe--Foreign relations--Baltic States.
National security--Baltic States
North Atlantic Treaty Organization
Princeton subject headings:
Baltic States--Foreign relations--Europe.
Europe--Foreign relations--Baltic States.
National security--Baltic States.
North Atlantic Treaty Organization.