Columbia subject headings:
Baltic States--Strategic aspects.
National security--Baltic States.
National security--Scandinavia.
North Atlantic Treaty Organization--Membership.
Scandinavia--Strategic aspects.
United States--Military policy.
Harvard subject headings:
Baltic States--Strategic aspects.
National security--Baltic States
National security--Scandinavia
North Atlantic Treaty Organization--Membership.
Scandinavia--Strategic aspects.
United States--Military policy.
Princeton subject headings:
Baltic States--Foreign relations.
Baltic States--Strategic aspects.
National security--Baltic States.
National security--Scandinavia.
Scandinavia--Foreign relations.
Scandinavia--Strategic aspects.