Columbia subject headings:
Central Latinoamericana de Trabajadores--Periodicals.
Labor unions--Latin America--Periodicals.
Latin America--Social conditions--Periodicals.
Working class--Latin America--Periodicals.
Harvard subject headings:
Central Latinoamericana de Trabajadores--Periodicals.
Princeton subject headings:
Central Latinoamericana de Trabajadores--Periodicals.
Labor unions--Latin America--Periodicals.
Labor--Latin America--Periodicals.
Latin America--Social conditions--Periodicals.