Columbia subject headings:
Arecibo (P.R.)--Economic conditions.
Merchants--Puerto Rico--History--19th century.
Puerto Rico--Politics and government--To 1898.
Sugar trade--Puerto Rico--History--19th century.
Harvard subject headings:
Arecibo (P.R.)--Economic conditions.
Merchants--Puerto Rico--History--19th century.
Puerto Rico--Politics and government--To 1898
Sugar trade--Puerto Rico--History--19th century.
Princeton subject headings:
Puerto Rico--Commerce--History--19th century.
Puerto Rico--Politics and government--To 1898.
Social conflict--Puerto Rico--History--19th century.
Sugar trade--Political aspects--Puerto Rico--History--19th century.