Columbia subject headings:
Labor unions--Europe--History--20th century.
Oral history.
Working class--Europe--History--20th century.
Harvard subject headings:
Labor unions--Europe--History--20th century.
Oral history.
Working class--Europe--History--20th century.
Princeton subject headings:
Labor movement--Europe--History--20th century.
Labor unions--Europe--History--20th century.
Oral history.