Columbia subject headings:
Haciendas--Puerto Rico--Vega Baja--History--19th century.
Sugarcane industry--Puerto Rico--Vega Baja--History--19th century.
Harvard subject headings:
Haciendas--Puerto Rico--Vega Baja--History--19th century.
Sugarcane industry--Puerto Rico--Vega Baja--History--19th century.
Princeton subject headings:
Agricultural laborers--Puerto Rico--Vega Baja--History--19th century.
Haciendas--Puerto Rico--Vega Baja--History--19th century.
Sugar trade--Puerto Rico--Vega Baja--History--19th century.
Sugarcane industry--Puerto Rico--Vega Baja--History--19th century.
Vega Baja (P.R.)--Economic conditions.