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\bibitem{Herbert_etal1998} Herbert, R. B., Jr., Benner, S. G., \& Blowes, D. W. (1998). Reactive barrier treatment of groundwater contaminated by acid mine drainage; sulphur accumulation and sulphide formation. In M. Herbert, \& K. Kovar (Eds.), \textit{Groundwater Quality: Remediation and Protection} (pp. 451--457). IAHS-AISH Publication, vol.250.

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