NEPAD (New Partnership for Africa’s Development). 2001. The New Partnership for Africa’s Development. Available at <http://www.dfa.gov.za/events/nepad.pdf>. Accessed May 29, 2002.
NRC (National Research Council). 1993. Toward a Coordinated Spatial Data Infrastructure for the Nation. Washington, DC: National Academy Press.
NRC. 1995. A Data Foundation for the National Spatial Data Infrastructure. Washington, DC: National Academy Press.
NRC. 1999. Our Common Journey: A Transition Toward Sustainability. Washington, DC: National Academy Press.
NRC. 2001. National Spatial Data Infrastructure Partnership Programs: Rethinking the Focus. Washington, DC: National Academy Press.
SADC (Southern African Development Community). 2001. SADC Progress Report on the Implementation of Agenda 21 and Sustainable Development: A Report Submitted to the 2002 World Summit on Sustainable Development. Available at <http://www.johannesburgsummit.org/web_pages/sadc_prepcom_progress_report.pdf>. Accessed May 20, 2002.
Savitsky, B. G. and T. E. Lacher, Jr. 1998. GIS Methodologies for Developing Conservation Strategies. New York: Columbia University Press.
UN (United Nations). 2002a. U.N.’s Rio Plus 10 Review from Prepcom2. Available at <http://www.johannesburgsummit.org/html/documents/no170793sgreport.pdf>. Accessed May 29, 2002.
UN. 2002b. Second Local Agenda 21 Survey, UN Department of Social and Economic Affairs, background paper No. 15 (DESA/DSD/PC2/ BP15). Available at <http://www.iclei.org/rioplustenfinal_document.pdf>. Accessed April 14, 2002.
UNCED (United Nations Conference on Environment and Development). 1992. Report of the United Nations Conference on Environment and Development, Rio de Janeiro, 3-14 June 1992. Rio de Janeiro: UN. (Annex I: Rio Declaration; Annex II: Agenda 21)
UNEP (United Nations Environment Programme). 1999. Global Environmental Outlook 2000. London: Earthscan.
UNEP. 2001. Assessment of Progress on Sustainable Development in Africa Since Rio (1992). Available at <http://www.ecs.co.sz/wssd/roa_assessment_of_progress.htm>. Accessed June 25, 2002.
WBCSD (World Business Council for Sustainable Development) website. 2002. Case studies. Available at <http://www.wbcsd.org/casestud/index.htm>. Accessed May 20, 2002.
WCED (World Commission on Environment and Development). 1987. Our Common Future. New York: Oxford University Press.
Wilson, E. O. 1992. The Diversity of Life. New York: W.W. Norton and Company.