Columbia subject headings:
Balkan Peninsula--Kings and rulers--Biography.
Balkan Peninsula--Politics and government.
Harvard subject headings:
Authoritarianism--Balkan Peninsula.
Balkan Peninsula--Kings and rulers--Biography.
Balkan Peninsula--Politics and government--20th century.
Heads of state--Balkan Peninsula.
Princeton subject headings:
Authoritarianism--Balkan Peninsula.
Balkan Peninsula--Kings and rulers--Biography.
Balkan Peninsula--Politics and government--20th century.
Heads of state--Balkan Peninsula.