Columbia subject headings:
Electrical, Electronic, Telecommunication, and Plumbing Union (Great Britain)
Labor unions--Great Britain--History.
Harvard subject headings:
Electrical, Electronic, Telecommunication, and Plumbing Union (Great Britain)
Labor unions--Great Britain--History
Princeton subject headings:
Electrical, Electronic, Telecommunication, and Plumbing Union (Great Britain)
Labor unions--Great Britain--History.