Columbia subject headings:
Balkan Peninsula--Economic conditions--Periodicals.
Balkan Peninsula--Foreign relations--20th century--Periodicals.
Balkan Peninsula--Politics and government--20th century--Periodicals.
Harvard subject headings:
Balkan Peninsula--Economic conditions--Periodicals.
Balkan Peninsula--Foreign relations--20th century--Periodicals.
Balkan Peninsula--Politics and government--20th century--Periodicals.
Princeton subject headings: