Columbia subject headings:
Minorities--Europe, Central--History--20th century.
Minorities--Europe, Eastern--History--20th century.
Harvard subject headings:
Minorities--Europe, Central--History--20th century.
Minorities--Europe, Eastern--History--20th century.
Princeton subject headings:
Minorities--Europe, Central--History--20th century.
Minorities--Europe, Eastern--History--20th century.