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James Charles Napoleon Humphreys, Mining papers Item Com objeto digital
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Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of West Reef, Lindum Reef and Black Reef workings
Underground plan of West Reef, Lindum Reef and Black Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan, Battery Section (Rietvlei no. 113)
Underground plan, Battery Section (Rietvlei no. 113)
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