source oil reserves in the United States more information US reserves are estimated Oil reserves in the USA more information http://en.wikiped...d_States 155BBL Oil reserves in the United States US oil reserves http://en.wikipedia.org/wiki/Oil_res..._United_States source US reserves are estimated USGS US reserves are estimated había dejado de ser el gran productor http://en.wikipedia.org... large amounts of oil http://en.wikipedia.org... government oil reserves large amounts of oil more information half of what it was then. English 21 billion barrels