Columbia subject headings:
Alagoas (Brazil)--Economic conditions.
Sugar trade--Brazil--Alagoas.
Sugarcane--Brazil--Alagoas.
Harvard subject headings:
Alagoas (Brazil)--Economic conditions.
Sugar trade--Brazil--Alagoas.
Sugarcane--Brazil--Alagoas.
Princeton subject headings:
Sugar growing--Brazil--Alagoas.
Sugar trade--Brazil--Alagoas.