1. Environmental degradation in the Pantanal ecosystem;Alho;BioScience,1988
2. Expansion of the agrarian and demographic frontier in the Peruvian Selva;Aramburú,1984
3. Behavioral and material determinants of production relations in land abundant tropical agriculture;Binswanger;Economic Development and Cultural Change,1987
4. Feeding a human population that increasingly crowds a fragile planet. Keynote Lecture;Borlaug,1994
5. Sistema de producción para cría extensiva de ganado de carne en los Llanos Orientales de Colombia;Botero,1985