1. Food and Agriculture Organization (FAO), Informe del Taller Internacional sobre Políticas de los Sistemas de Areas Protegidas en la Conservación y Uso Sostenible de la Biodiversidad en América Latina (Oficina Regional de la FAO para América Latina y el Caribe, Santiago, Chile, 1994).
2. World Conservation Monitoring Centre, Global Biodiversity: Status of Earth Living Resources (Chapman & Hall, London, 1992)World Wildlife Fund (WWF), World Bank and WWF Join Forces to Conserve Earth's Forests (WWF, Washington, DC, 1997); International Union for Conservation of Nature and Natural Resources (IUCN), Caring for the Earth: A Strategy for Sustainable Living (IUCN-UNEP-WWF, Gland, Switzerland, 1989).
3. The Worldwide Extent of Land-Use Change
4. Lawton J. H. and , May R. M., Eds., Extinction Rates (Oxford Univ. Press, Oxford, 1995);
5. The Future of Biodiversity