Columbia subject headings:
Sugarcane industry--Mexico--History.
Harvard subject headings:
Sugar trade--Mexico--History.
Sugar workers--Mexico--History.
Sugar--Manufacture and refining--Mexico--History.
Sugarcane industry--Mexico--History.
Princeton subject headings:
Sugar trade--Mexico--History.
Sugar workers--Mexico--History.
Sugar--Manufacture and refining--Mexico--History.
Sugarcane industry--Mexico--History.