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\bibitem{Verreydt_etal2013} {\textquotedblleft}\textit{Field demonstration and evaluation of the passive flux meter on a CAH groundwater plume}{\textquotedblright}. Verreydt G, Annable MD, Kaskassian S, van Keer I, Bronders J, Diels L, Vanderauwera P, Environmental Science and Pollution Research \textbf{20}, 4621 (2013).   http://doi.org/10.1007/S11356-012-1417-8

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