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\bibitem{Younger_etal1997} Younger, P. L., Neal, C., House, W. A., Leeks, G. J. L., \& Marker, A. H. (1997). The longevity of minewater pollution; a basis for decision-making U.K. fluxes to the North Sea; Land Ocean Interaction Study (LOIS); river basins research, the first two years. \textit{The Science of the Total Environment}, \textit{194-195}, 457--466.

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