Columbia subject headings:
Ethanol fuel industry--Brazil--Employees.
Ethanol fuel industry--Brazil.
Harvard subject headings:
Alcohol as fuel--Brazil.
Alcohol as fuel--Economic aspects--Brazil.
Alcohol fuel industry--Brazil--Employees.
Alcohol fuel industry--Brazil.
Energy crops--Brazil.
Ethanol fuel industry--Brazil--Employees.
Ethanol fuel industry--Brazil.
Princeton subject headings:
Alcohol fuel industry--Brazil--Employees.
Alcohol fuel industry--Brazil.