Columbia subject headings:
Harvard subject headings:
Confederación General del Trabajo de la República Argentina--History.
Labor movement--Argentina--History--19th century.
Labor movement--Argentina--History--20th century
Labor unions--Argentina--History--19th century.
Labor unions--Argentina--History--20th century
Princeton subject headings:
Confederación General del Trabajo de la República Argentina--History.
Labor unions--Argentina--History--20th century.