http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Statistiques annuelles des hydrocarbures et du gaz naturel
International Energy Agency, Organisation for Economic Co-operation and Development
Companion volume with data in a common unit: Energy balances of OECD countries.
Annual oil and gas statistics and main historical series