Columbia subject headings:
Demonstrations--Switzerland--Geneva--History--20th century.
Labor movement--Political activity--Switzerland--History--20th century--Congresses.
Labor unions--Political activity--Switzerland--History--20th century--Congresses.
Strikes and lockouts--Switzerland--History--20th century--Congresses.
Harvard subject headings:
Demonstrations--Switzerland--Geneva--History--20th century.
Labor movement--Political activity--Switzerland--History--20th century--Congresses.
Labor unions--Political activity--Switzerland--History--20th century--Congresses.
Strikes and lockouts--Switzerland--History--20th century--Congresses.
Princeton subject headings: