Columbia subject headings:
Middle class--Sweden--History--19th century.
Middle class--Sweden--History--20th century.
Sweden--Social conditions.
Sweden--Social life and customs.
Harvard subject headings:
Middle class--Sweden--History--19th century.
Middle class--Sweden--History--20th century.
Sweden--Social conditions.
Sweden--Social life and customs.
Princeton subject headings:
Middle class--Sweden--History--19th century.
Middle class--Sweden--History--20th century.
Sweden--Social conditions.
Sweden--Social life and customs.