Columbia subject headings:
Rio de Janeiro (Brazil)--Social conditions.
Slavery--Brazil--Rio de Janeiro--History--19th century.
Harvard subject headings:
Slavery--Brazil--Rio de Janeiro--History--19th century.
Slaves--Brazil--Rio de Janeiro--History--19th century.
Princeton subject headings:
Slavery--Brazil--Rio de Janeiro--History--19th century.
Slaves--Brazil--Rio de Janeiro--History--19th century.