Columbia subject headings:
Adjuntas (P.R.)--Economic conditions.
Coffee industry--Puerto Rico--Adjuntas--History--19th century.
Coffee plantation workers--Puerto Rico--Adjuntas--History--19th century.
Haciendas--Puerto Rico--Adjuntas--History--19th century.
Social classes--Puerto Rico--Adjuntas--History--19th century.
Harvard subject headings:
Adjuntas (P.R.)--Economic conditions.
Coffee industry--Puerto Rico--Adjuntas--History--19th century.
Coffee plantation workers--Puerto Rico--Adjuntas--History--19th century.
Haciendas--Puerto Rico--Adjuntas--History--19th century.
Social classes--Puerto Rico--Adjuntas--History--19th century.
Princeton subject headings:
Adjuntas (P.R.)--Economic conditions.
Coffee industry--Puerto Rico--Adjuntas--History--19th century.
Coffee plantation workers--Puerto Rico--Adjuntas--History--19th century.
Haciendas--Puerto Rico--Adjuntas--History--19th century.
Social classes--Puerto Rico--Adjuntas--History--19th century.