Columbia subject headings:
Europe, Eastern--Foreign relations--Periodicals.
Europe, Southern--Foreign relations--Periodicals.
National security--Europe, Eastern--Periodicals.
National security--Europe, Southern--Periodicals.
Harvard subject headings:
Europe, Eastern--Foreign relations--Periodicals.
Europe, Southern--Foreign relations--Periodicals.
National security--Europe, Eastern--Periodicals.
National security--Europe, Southern--Periodicals.
Princeton subject headings:
Balkan Peninsula--Foreign relations--Periodicals.
Balkan Peninsula--Politics and government--Periodicals.
National security--Europe, Eastern--Periodicals.
National security--Europe, Southern--Periodicals.