Columbia subject headings:
Harvard subject headings:
Health insurance--Great Britain--History.
Medical care--Great Britain--History.
Medical economics--Great Britain--History--19th century.
Medical economics--Great Britain--History--20th century.
Social medicine--Great Britain--History--19th century.
Social medicine--Great Britain--History--20th century.
Working class--Medical care--Great Britain--History--19th century.
Working class--Medical care--Great Britain--History--20th century.
Princeton subject headings:
Health insurance--Great Britain--History.
Medical care--Great Britain--History.
Working class--Medical care--Great Britain--History.