http://tonto.eia.doe.gov/oog/info/twip/twip.asp U.S. petroleum fuels prices and volumns nationally and by region. en-us http://www.eia.doe.gov/images2/eiasmltitle.gif http://www.eia.doe.gov/ US Energy Information Administration http://tonto.eia.doe.gov/oog/info/twip/twip.asp 11/4/2009 TWIP includes recent analysis of current petroleum issues as well as prices and volumes of major petroleum products. http://tonto.eia.doe.gov/oog/info/twip/twiparch/091104/twipprint.html 11/4/2009 The Energy Information Administration's (EIA) U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves, 2008 reports that proved reserves of crude oil fell by more than 10 percent in 2008, primarily because of low end-of-year prices used to estimate proved reserves, even though discoveries of crude oil rose for the third year in a row. In contrast, proved reserves of natural gas rose by 3 percent in 2008, despite low end-of-year prices. ... http://tonto.eia.doe.gov/oog/info/twip/twiparch/twiparch.html Chronological list of TWIP articles.