Columbia subject headings:
Harvard subject headings:
Industrial relations--Switzerland--History--20th century.
Labor movement--Switzerland--History--20th century.
Labor unions--History--20th century.
Labor unions--Switzerland--History--20th century.
Princeton subject headings:
Industrial relations--Switzerland--History--20th century.
Labor movement--Switzerland--History--20th century.
Labor unions--History--20th century.
Labor unions--Switzerland--History--20th century.