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http://www.theoildrum.com/node/8625
http://www.petrostrategies.org/Learning_Center/oil_transportation.htm
http://science.howstuffworks.com/environmental/energy/oil-drilling6.htm
http://www.energytrendsinsider.com/research/crude-oil/where-the-us-gets-its-oil-from/
http://www.energyrefuge.com/archives/where_oil_comes_from.htm
http://www.edfenergy.com/energyfuture/oil
http://www.appea.com.au/oil-gas-explained/resources/where-are-oil-and-gas-found/
http://www.sjvgeology.org/oil/oil.html
http://www.quoteoil.com/oil-imports.html
http://www.epa.gov/cleanenergy/energy-and-you/affect/air-emissions.html
http://www.petrostrategies.org/Learning_Center/oil_transportation.htm
http://science.howstuffworks.com/environmental/energy/oil-drilling6.htm
http://www.energytrendsinsider.com/research/crude-oil/where-the-us-gets-its-oil-from/
http://www.energyrefuge.com/archives/where_oil_comes_from.htm
http://www.edfenergy.com/energyfuture/oil
http://www.appea.com.au/oil-gas-explained/resources/where-are-oil-and-gas-found/
http://www.sjvgeology.org/oil/oil.html
http://www.quoteoil.com/oil-imports.html
http://www.epa.gov/cleanenergy/energy-and-you/affect/air-emissions.html