Columbia subject headings:
Birmingham (England)--Social conditions.
Sheffield (England)--Social conditions.
Social classes--England--Birmingham--History.
Social classes--England--Sheffield--History.
Social conflict.
Harvard subject headings:
Birmingham (England)--Social conditions.
Sheffield (England)--Social conditions.
Social classes--England--Birmingham--History.
Social classes--England--Sheffield--History.
Social conflict.
Princeton subject headings:
Birmingham (England)--Social conditions.
Sheffield (England)--Social conditions.
Social classes--England--Birmingham--History.
Social classes--England--Sheffield (South Yorkshire)--History.
Social conflict.