Columbia subject headings:
Europe--Ethnic relations--Congresses.
Minorities--Europe--Congresses.
Harvard subject headings:
Europe--Ethnic relations--History--20th century--Congresses.
Europe--History--1918-1945--Congresses.
Europe--Politics and government--1918-1945--Congresses.
Germans--Foreign countries--History--20th century--Congresses.
Germans--Political activity--Balkan Peninsula--Congresses.
Germans--Political activity--Europe, Central--Congresses.
Minorities--Europe--History--20th century--Congresses.
Minorities--Political activity--Balkan Peninsula--Congresses.
Minorities--Political activity--Europe, Central--Congresses.
Princeton subject headings:
Germans--Political activity--Balkan Peninsula--Congresses.
Germans--Political activity--Europe, Central--Congresses.
Minorities--Political activity--Balkan Peninsula--Congresses.
Minorities--Political activity--Europe, Central--Congresses.