↑ Cities and Urbanisation The United Nations has set up its own classifications scheme: a "big city" is a locality with 500,000 or more inhabitants; a "city" is a locality with 100,000 or more inhabitants; an "urban locality" is a locality with 20,000 or more inhabitants; a "rural locality" is a locality with less than 20,000 inhabitants..., Sociumas magazine. Retrieved 15 July 2006.
↑ Metropolis Association A full member is either a capital city or a city with more than one million inhabitants, City Mayors: Metropolis World Congress. Retrieved 15 July 2006.
