Columbia subject headings:
Harvard subject headings:
Great Britain--Social conditions--19th century--Pictorial works.
Great Britain--Social conditions--20th century--Pictorial works.
Working class--Great Britain--History--Pictorial works.
Princeton subject headings:
Great Britain--Social conditions--19th century--Pictorial works.
Great Britain--Social conditions--20th century--Pictorial works.
Working class--Great Britain--History--Pictorial works.