File:Kopia av BlankMap-World-v5.png

Summary
Based on Image:BlankMap-World-v5.png

Data source: World Resources Institute. 2006. Available at http://earthtrends.wri.org. Washington DC: World Resources Institute. Meny "Economics, Business, and the Environment", submeny "Searchable Database".

"Development Data Group, The World Bank. 2006. 2006 World Development Indicators. Washington, DC: The World Bank. Available online at: The World Development Indicators website."