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Risk attitudes of subsistence farmers in Northeast Brazil : a sampling approach
Dillon, John L., (19XX)
Resources efficiency and the market for family labor : smalls farms in the Sertao of Northeast, Brazil
Teixeira, Teotonio Dias, (1976)
Formação do exedente e comercialização de alimentos básicos no Nordeste
Bernal, Maria Cleide Carlos, (1981)