World’s Richest Countries by Oil and Gas Reserves [Infographic] yucin December 5, 2013 Business, Cheat Sheet, City, Economy, Energy, Guide, Industry, Quick Reference, ScienceSource : http:// en.ria.ru /infographics/20130320/180136761/The-Worlds-Richest-Countries-by-Oil-and-Gas-Reserves.html
