Un estudio de medida para predecir el uso de la biblioteca en una institución colombiana = The development of a measuring instrument for predicting library use in a Colombian institution
The impact of food aid on commercial food export: paper presented at the XIV International Conference of Agriculutral Economists. IAAE in Minsk, Russia. August 24-September 2, 1970.
Improved forage grasses: Bringing their integration into humid to sub-humid livestock production systems to scale