1. INTL. MONETARY FUND: International Financial Statistics 20: 25, 86, 1967
2. Nutrition Survey, May—August, 1960: Colombia,1961
3. The cost of subsistence;STIGLER;J. Farm Econ.,1945
4. Electronic Computation of Human Diets. MSU Bus. Studies, 1963;SMITH,1964
5. Tabla de Composición de Alimentos Colombianos;GONGORA,1959