Columbia subject headings:
Harvard subject headings:
Confederación de Trabajadores de América Latina--History--Congresses.
Confederación de Trabajadores de América Latina--History.
Labor movement--Latin America--History--20th century.
Labor unions--Latin America--History--20th century--Congresses.
Lombardo Toledano, Vicente, 1894-1968
Lombardo Toledano, Vicente, 1894-1968--Congresses.
Princeton subject headings:
Confederación de Trabajadores de América Latina--History--Congresses.
Labor unions--Latin America--History--20th century--Congresses.
Lombardo Toledano, Vicente, 1894-1968--Congresses.