PricewaterhouseCoopers. The 150 richest cities in the world by GDP in 2005. March 11,2007. . citymayo rs. co m/statistics/richest-cities-2005. html.
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Xia T, Zhang Y, Crabb S, Shah P. Cobenefits of replacing car trips with alternative transportation: a review of evidence and methodological issues. Journal of Environmental and Public Health 2013;2013:797312:1-14.
