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James Charles Napoleon Humphreys, Mining papers Item 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
Results 341 to 345 of 345