Arab Oil & Gas Journal
Bloomberg
Cato Institute
Central Intelligence Agency: The World Factbook
Council on Foreign Relations
EIA: Country Analysis Brief Iran
EIA: Natural Gas Exports from Iran
Facts Global Energy
FGE
IEA: Medium-Term Oil Market Report 2013 and 2014
IEA: Oil Market Report (Jan 14-Nov 14)
National Iranian Oil Company
Oil & Gas Journal
OPEC Annual Statistical Bulletin
Reuters
US Department of State
US Treasury
Wall Street Journal
Washington Institute for Near East Policy
World Nuclear Association