Columbia subject headings:
Europe--Defenses.
Europe--Military policy.
European Union--Military policy.
National security--Europe.
National security--Turkey.
Turkey--Defenses.
Turkey--Military policy.
Harvard subject headings:
Europe--Defenses.
Europe--Military policy.
European Union--Military policy.
National security--Europe
National security--Turkey
Turkey--Defenses.
Turkey--Military policy.
Princeton subject headings:
Europe--Foreign relations--Turkey.
National security--Turkey.
Turkey--Foreign relations--Europe.