Columbia subject headings:
Nationalism--Wales.
Wales--Politics and government--20th century.
Wales--Social life and customs--20th century.
Harvard subject headings:
National characteristics, Welsh.
Nationalism--Wales--History--20th century.
Nationalism--Wales.
Wales--Politics and government--20th century
Wales--Social conditions--20th century.
Wales--Social life and customs--20th century.
Princeton subject headings:
Nationalism--Wales.
Wales--Politics and government--20th century.
Wales--Social life and customs--20th century.