Columbia subject headings:
Coal miners--Great Britain--History.
Industrial sociology--Case studies.
Machinists--Great Britain--History.
Textile workers--Great Britain--History.
Working class--Great Britain--History.
Harvard subject headings:
Coal miners--Great Britain--History.
Industrial sociology--Case studies.
Machinists--Great Britain--History.
Textile workers--Great Britain--History.
Working class--Great Britain--History
Princeton subject headings:
Labo--Great Britain--History.
Labor unions--Great Britain--History.