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\bibitem{Smedley_etal2023} Smedley, P. L., Bearcock, J. M., Ward, R. S., Crewdson, E., Bowes, M. J., Darling, W. G., et al. (2023). Monitoring of methane in groundwater from the Vale of Pickering, UK: Temporal variability and source discrimination. \textit{Chemical Geology}, \textit{636}, 121640.

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