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ACS Omega|August 29, 2019
Temporal Variations in Methane Emissions from an Unconventional Well SiteDerek Johnson, Robert Heltzel, Dakota Oliver
Journal of the Air & Waste Management Association (1995)|October 11, 2016
Development of engine activity cycles for the prime movers of unconventional natural gas well developmentDerek Johnson, Robert Heltzel, Andrew Nix, et al.
Environmental Science & Technology|April 14, 2018
Estimated Emissions from the Prime-Movers of Unconventional Natural Gas Well Development Using Recently Collected In-Use Data in the United StatesDerek Johnson, Robert Heltzel, Andrew Nix, et al.
Atmospheric Environment: X|April 24, 2023
Methane emissions from oil and gas production sites and their storage tanks in West VirginiaDerek Johnson, Nigel Clark, Robert Heltzel, et al.
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