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\bibitem{Ketellapper_etal1996} Ketellapper, V. L., Williams, L. O., Bell, R. S., \& Cramer, M. H. (1996). The control of acid mine drainage at the Summitville Mine Superfund Site. In \textit{Proceedings of the Symposium on the Application of Geophysics to Environmental and Engineering Problems (SAGEEP), vol.1996} (pp. 303--311).

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