World Oil Production at 3/31/2014-Where are We Headed? - Resilience
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Top 10 oil and gas producing countries in 2012 - MINING.COM
Business Insider
Top 10 oil and gas producing countries in 2012 - MINING.COM
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Saudi Arabia was world's largest petroleum producer and net exporter in 2012 - Today in Energy - U.S. Energy Information Administration (EIA)
Share of global oil production among the top oil producing countries 2019 | Statista
Cost of Oil Production by Country - knoema.com
Leading oil-producing countries by global production share 2019 | Statista
The United States is now the largest global crude oil producer - Today in Energy - U.S. Energy Information Administration (EIA)
Anas Alhajji on Twitter: "- The US is the largest oil producer in the world. - #Venezuela is no longer in the top ten oil producers - #Brazil moving up the ladder #
Af-Pak – The Coming Oil Bottleneck
Petrobras set to become world's largest oil producer, says Rystad | Offshore
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The U.S. leads global petroleum and natural gas production with record growth in 2018 - Today in Energy - U.S. Energy Information Administration (EIA)
List of countries by oil exports - Wikipedia
Oil Production by Country: The Top Players of 2020
