Columbia subject headings:
Harvard subject headings:
Plantations--Puerto Rico--Ponce Region--History.
Ponce Region (P.R.)--Rural conditions.
Slavery--Puerto Rico--Ponce Region--History.
Sugar trade--Puerto Rico--Ponce Region--History.
Princeton subject headings:
Plantations--Puerto Rico--Ponce Region--History.
Ponce Region (P.R.)--Rural conditions.
Slavery--Puerto Rico--Ponce Region--History.
Sugar trade--Puerto Rico--Ponce Region--History.