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\bibitem{Blowes_etal2003} Blowes, D. W., Bain, J. G., Smyth, D. J., Ptacek, C. J., Jambor, J. L., Blowes, D. W., et al. (2003). Treatment of mine drainage using permeable reactive materials. \textit{Environmental Aspects of Mine Wastes}, \textit{31}, 361--376.

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