Columbia subject headings:
Harvard subject headings:
Balkan Peninsula--Cultural policy.
Balkan Peninsula--Economic conditions--20th century.
Balkan Peninsula--Economic policy.
Balkan Peninsula--Politics and government--20th century.
Europe, Central--Cultural policy.
Europe, Central--Economic conditions--20th century.
Europe, Central--Economic policy.
Europe, Central--Politics and government--20th century.
Princeton subject headings:
Europe, Central--Economic conditions--20th century.
Europe, Central--History--20th century.
Europe, Central--Politics and government--20th century.
Europe, Eastern--Economic conditions--20th century.
Europe, Eastern--History--20th century.
Europe, Eastern--Politics and government--20th century.