Columbia subject headings:
Agricultural laborers--Brazil, Northeast.
Agriculture--Economic aspects--Brazil, Northeast.
Sugar trade--Brazil, Northeast.
Sugar workers--Brazil, Northeast.
Harvard subject headings:
Agricultural laborers--Brazil, Northeast.
Agriculture--Economic aspects--Brazil, Northeast
Sugar trade--Brazil, Northeast.
Sugar workers--Brazil, Northeast.
Princeton subject headings:
Agricultural laborers--Brazil, Northeast.
Agriculture--Economic aspects--Brazil, Northeast.
Sugar trade--Brazil, Northeast.
Sugar workers--Brazil, Northeast.