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Archivistische beschrijving
Historical Papers Research Archive, University of the Witwatersrand James Charles Napoleon Humphreys, Mining papers Stuk With digital objects
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Underground workings of Main Reef
Underground workings of Main Reef
Underground workings of South Reef
Underground workings of South Reef
Underground workings of Main Reef
Underground workings of Main Reef
Plan of holdings with boreholes, shafts and underground development
Plan of holdings with boreholes, shafts and underground development
Plan of Houtpoort section with boreholes, shafts and underground development
Plan of Houtpoort section with boreholes, shafts and underground development
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