Columbia subject headings:
Eight-hour movement--History.
Hours of labor--Switzerland--History--20th century.
Labor unions--Switzerland--History--20th century.
Harvard subject headings:
Eight-hour movement.
Hours of labor--Switzerland--History--20th century.
Labor unions--Switzerland--History--20th century.
Princeton subject headings:
Eight-hour movement--History.
Hours of labor--Switzerland--History--20th century.
Labor unions--Switzerland--History--20th century.