Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Brazil--Paraíba (State)
Paraíba (Brazil : State)--Economic conditions.
Production (Economic theory)
Princeton subject headings:
Paraíba (Brazil : State)--Economic conditions.
Sugar factories--Brazil--Paraíba (State).
Sugar--Manufacture and refining--Brazil--Paraíba (State).
Sugarcane products--Brazil--Paraíba (State).