Correspondencia con Organismos Internacionales: International Research Centers Directory, CartActual and CartInform, United States Departament of Agriculture, Agency for International Development, Consejo Superior de Investigaciones Cientificas, PROEXPORT-COLOMBIA, Piereck & Luce, CICRED, Departament of Development Economics in Holanda, Institute of Developing Economies Tokio, The University of Texas at Austin, Geosystems of USA, Consejería Comercial de México
