Columbia subject headings:
Harvard subject headings:
Great Britain--Economic conditions--19th century--Sources.
Great Britain--Social conditions--19th century--Sources.
Working class--Great Britain--Biography
Working class--Great Britain--History--19th century--Sources.
Princeton subject headings:
Great Britain--Economic conditions--19th century--Sources.
Great Britain--Social conditions--19th century--Sources.
Working class--Great Britain--Biography.
Working class--Great Britain--History--19th century--Sources.