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\bibitem{Demchak_etal2001} Demchak, J., Morrow, T., Skousen, J., Donovan, J. J., \& Rose, A. W. (2001). Treatment of acid mine drainage by four vertical flow wetlands in Pennsylvania Evolution and remediation of acid-sulfate groundwater systems at reclaimed mine-sites. \textit{Geochemistry -- Exploration, Environment, Analysis}, \textit{1}(1), 71--80.

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