Columbia subject headings:
Slave trade--Brazil--Rio Grande do Sul (State)--History--18th century--Sources.
Slave trade--Brazil--Rio Grande do Sul (State)--History--19th century--Sources.
Slaves--Brazil--Rio Grande do Sul (State)--History--18th century--Sources.
Slaves--Brazil--Rio Grande do Sul (State)--History--19th century--Sources.
Harvard subject headings:
Slave trade--Brazil--Rio Grande do Sul (State)--History--18th century--Sources.
Slave trade--Brazil--Rio Grande do Sul (State)--History--19th century--Sources.
Slave trade--Brazil--Rio Grande do Sul (State)--History--Sources.
Slaves--Brazil--Rio Grande do Sul (State)--History--18th century--Sources.
Slaves--Brazil--Rio Grande do Sul (State)--History--19th century--Sources.
Princeton subject headings:
Slave trade--Brazil--Rio Grande do Sul (State)--History--Sources.