http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Organisation for Economic Co-operation and Development
pt. 1. Natural gas market review -- pt 2. World overview -- pt. 3. OECD Overview -- pt. 4. OECD detailed natural gas data -- pt. 5. Historical time series for OECD countries -- pt. 6. Maps of pipeline infrastructure-organization and regulation of gas transportation.