Brennan, S. T. (2021). National assessment of helium resources within known natural gas reservoirs. U.S. Department of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationBrennan, Sean T. National Assessment of Helium Resources Within Known Natural Gas Reservoirs. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2021.
MLA (9th ed.) CitationBrennan, Sean T. National Assessment of Helium Resources Within Known Natural Gas Reservoirs. U.S. Department of the Interior, U.S. Geological Survey, 2021.
Warning: These citations may not always be 100% accurate.