1. United States Energy Information Administration (2022) Independent Statistics and Analysis. Monthly Energy Review, OE/EIA-0035, 5.
2. Methane Emissions from Conventional and Unconventional Natural Gas Production Sites in the Marcellus Shale Basin
3. United States Energy Information Administration (2016) Independent Statistics and Analysis, “U.S. Energy Facts—Imports and Exports—U.S. Energy Information Administration (EIA)”. https://www.eia.gov/energyexplained/us-energy-facts/imports-and-exports.php
4. The American Oil and Gas Reporter. “U.S. Rig Count Data Available from Baker Hughes”. https://www.aogr.com/web-exclusives/us-rig-count/2022
5. Chapa, S. (2019, April 30) Baker Hughes Chooses Permian Basin to Debut “Electric Frack” Technology. https://www.houstonchronicle.com/business/energy/article/Baker-Hughes-chooses-Permian-Basin-to-debut-13808592.php