Columbia subject headings:
Paraíba (Brazil : State)--History.
Sugar trade--Brazil--Paraíba (State)--History.
Harvard subject headings:
Paraíba (Brazil : State)--History.
Sugar trade--Brazil--Paraíba (State)--History.
Sugar trade--Brazil--Paraíba--History.
Princeton subject headings:
Paraíba (Brazil : State)--History.
Sugar trade--Brazil--Paraíba (State)--History.