Columbia subject headings:
Harvard subject headings:
National security--Europe
North Atlantic Treaty Organization--Armed Forces--Organization.
North Atlantic Treaty Organization--Asia, Central.
North Atlantic Treaty Organization--Caucasus
North Atlantic Treaty Organization--Europe, Eastern.
North Atlantic Treaty Organization--Membership.
North Atlantic Treaty Organization--Military policy.
Security, International
Princeton subject headings:
National security--Asia, Central.
National security--Caucasus.
National security--Europe, Eastern.
National security--Europe.
North Atlantic Treaty Organization--Armed Forces.
North Atlantic Treaty Organization.
Security, International.