Columbia subject headings:
Harvard subject headings:
Archer, Laird, 1892-1981.
Balkan Peninsula--Foreign relations--20th century.
Balkan Peninsula--Foreign relations.
Balkan Peninsula--Politics and government--20th century.
Balkan Peninsula--Politics and government.
Princeton subject headings:
Archer, Laird, 1892-1981.
Balkan Peninsula--Foreign relations.
Balkan Peninsula--Politics and government.