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\bibitem{Deshpande_etal1991} Deshpande, V. P., Pande, S. P., Gadkari, S. K., \& Saxena, K. L. (1991). Acid-mine Drainage Treatment. \textit{J. Environ. Sci. Health Part A-Environ. Sci. Eng. Toxic Hazard. Subst. Control}, \textit{26}(8), 1387--1408.

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