Columbia subject headings:
National security--Baltic States.
North Atlantic Treaty Organization--Baltic States.
North Atlantic Treaty Organization--Membership.
Harvard subject headings:
Baltic States--Relations--Russia (Federation)
National security--Europe
North Atlantic Treaty Organization--Baltic States.
North Atlantic Treaty Organization--Membership.
North Atlantic Treaty Organization--Military policy.
North Atlantic Treaty Organization--Russia (Federation)
North Atlantic Treaty Organization--United States.
Russia (Federation)--Relations--Baltic States.
United States--Military policy.
Princeton subject headings:
National security--Baltic States.
North Atlantic Treaty Organization--Baltic States.
North Atlantic Treaty Organization--Membership.