1. Wilson EO. The diversity of life. Cambridge: Harvard University Press, 1992.
2. Munro DA, Holdgate MW, eds. Caring for the earth: a strategy for sustainable living. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources, 1991.
3. Lacy RC, Kreeger TJ. VORTEX manual. Apple Valley: Captive Breeding Specialist Group, Species Survival Commission, International Union for Conservation of Nature and Natural Resources, 1992.
4. Smith B. The Arabian oryx comes back to its native desert. Smithsonian 1980;11:130–1.
5. Kleiman DB. Reintroduction of captive mammals for conservation. Bioscience 1989;39:152–61.