Columbia subject headings:
Harvard subject headings:
Argentina--Economic conditions--19th century.
Labor movement--Argentina--History--19th century.
Labor supply--Argentina.
Labor unions--Argentina--History--19th century.
Patroni, Adrián, 1867-1950.
Working class--Argentina
Working class--Argentina--History--19th century.
Princeton subject headings:
Argentina--Economic conditions--19th century.
Labor supply--Argentina.
Patroni, Adrián, 1867-1950.
Working class--Argentina.