Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Brazil, Northeast--History--19th century.
Land use--Brazil, Northeast--History--19th century.
Social conflict--Brazil, Northeast--History--19th century.
Princeton subject headings:
Agricultural laborers--Brazil, Northeast.
Brazil, Northeast--Rural conditions.
Peasants--Brazil, Northeast.
Social classes--Brazil, Northeast.
Social conflict--Brazil, Northeast.