Columbia subject headings:
Argentina--Politics and government--20th century.
Labor disputes--Argentina--History--20th century.
Labor unions--Political activity--Argentina--History--20th century.
Working class--Political activity--Argentina--History--20th century.
Harvard subject headings:
Argentina--Politics and government--1955-
Labor movement--Argentina--History--20th century
Labor unions--Political activity--Argentina--History--20th century
Working class--Argentina--History--20th century.
Working class--Political activity--Argentina--History--20th century.
Princeton subject headings:
Argentina--Politics and government--1955-
Labor movement--Argentina--History--20th century.
Labor unions--Political activity--Argentina--History--20th century.
Working class--Argentina--History--20th century.
Working class--Political activity--Argentina--History--20th century.