Links
[1] https://www.e-education.psu.edu/ebf301/node/684
[2] https://www.e-education.psu.edu/ebf301/686
[3] https://www.e-education.psu.edu/ebf301/node/675
[4] https://www.e-education.psu.edu/ebf301/node/680
[5] http://www.cmegroup.com/education/glossary.html
[6] http://intelligencepress.com/features/intcx/gas/
[7] http://www.cmegroup.com/trading/energy/crude-oil/light-sweet-crude.html
[8] http://www.cmegroup.com/trading/energy/natural-gas/natural-gas.html
[9] http://ir.eia.gov/ngs/ngs.html
[10] http://www.eia.gov/oil_gas/petroleum/data_publications/weekly_petroleum_status_report/wpsr.html
[11] http://www.nrc.gov/reading-rm/doc-collections/event-status/reactor-status/ps.html
[12] https://libraries.psu.edu/
[13] https://www.e-education.psu.edu/ebf301/node/689
[14] https://www.e-education.psu.edu/ebf301/node/55