Columbia subject headings:
Harvard subject headings:
Ethnicity--Europe, Central--History--20th century.
Ethnicity--Europe, Central--History--21st century.
Ethnicity--Europe, Eastern--History--20th century.
Ethnicity--Europe, Eastern--History--21st century.
Europe, Central--Social life and customs--20th century.
Europe, Central--Social life and customs--21st century.
Europe, Eastern--Social life and customs--20th century.
Europe, Eastern--Social life and customs--21st century.
Princeton subject headings:
Ethnicity--Europe, Central--History--20th century.
Ethnicity--Europe, Central--History--21st century.
Ethnicity--Europe, Eastern--History--20th century.
Ethnicity--Europe, Eastern--History--21st century.
Europe, Central--Social life and customs--20th century.
Europe, Central--Social life and customs--21st century.
Europe, Eastern--Social life and customs--20th century.
Europe, Eastern--Social life and customs--21st century.