Columbia subject headings:
Argentina--Politics and government--1910-1943.
General Strike, Buenos Aires, Argentina, 1919.
Labor unions--Argentina--History.
Social classes--Argentina--History.
Harvard subject headings:
Argentina--Politics and government--1910-1943
General Strike, Buenos Aires, Argentina, 1919.
Labor unions--Argentina--History
Social classes--Argentina--History.
Princeton subject headings:
Argentina--Politics and government--1910-1943.
Buenos Aires (Argentina)--General Strike, 1919.
Labor unions--Argentina--History.
Social classes--Argentina--History.