颁布单位：[University of the Free State] |  颁布时间：2015 |  实施时间：2015 |  学科分类：[["Coal, mines, and, mining--Environmental, aspects--South, Africa--Waterberg","Coalfields--South, Africa--Waterberg","Thesis, (Ph.D., (Institute, for, Groundwater, Studies))--University, of, the, Free, State,, 2015"]]

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