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\bibitem{Gong_etal1996} Gong, Z., Huang, J., \& Jiang, H. (1996). Study of comprehensive retrieval utilization and the treatment of acid mine wastewater. \textit{Zhongnan Gongye Daxue Xuebao = Journal of Central South University of Technology}, \textit{27}(4), 432--435.

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