Columbia subject headings:
Harvard subject headings:
Colombia--Economic conditions.
Colombia--Politics and government--1810-
Labor movement--Colombia--History--19th century.
Labor movement--Colombia--History--20th century.
Working class--Colombia--History--19th century.
Working class--Colombia--History--20th century.
Princeton subject headings:
Colombia--Economic conditions.
Colombia--Politics and government--19th century.
Colombia--Politics and government--20th century.
Labor movement--Colombia--History--19th century.
Labor movement--Colombia--History--20th century.
Working class--Colombia--History--19th century.
Working class--Colombia--History--20th century.