Columbia subject headings:
Harvard subject headings:
Agricultural industries--Brazil--Rio Grande do Sul.
Agriculture, Cooperative--Brazil--Rio Grande do Sul.
Soybean--Cooperative marketing--Brazil--Rio Grande do Sul.
Wheat--Cooperative marketing--Brazil--Rio Grande do Sul.
Princeton subject headings:
Agricultural industries--Brazil--Rio Grande do Sul.
Agriculture, Cooperative--Brazil--Rio Grande do Sul.
Soybean--Brazil--Rio Grande do Sul--Cooperative marketing.
Wheat--Brazil--Rio Grande do Sul--Cooperative marketing.