Home Publications & Data Book Visit to the family farm prototype unit and ranches of the Eastern Plains of Colombia author(s) Vera, Raúl R. published in1984 regions Colombia original file download full citation Vera, Raúl R.; Seré Rabé, Carlos. 1984. Visit to the family farm prototype unit and ranches of the Eastern Plains of Colombia. Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. v.