Columbia subject headings:
Harvard subject headings:
Sugar crops--History.
Sugar plantations--History.
Sugar trade--Environmental aspects.
Sugar trade--History.
Sugar trade--Social aspects.
Sugar--Health aspects.
Sugar--History.
Sugar--Social aspects.
Princeton subject headings:
Sugar trade--Environmental aspects.
Sugar trade--History.
Sugar trade--Social aspects.
Sugar--Health aspects.
Sugar--History.
Sugar--Social aspects.