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Description archivistique
Historical Papers Research Archive, University of the Witwatersrand James Charles Napoleon Humphreys, Mining papers Avec objets numériques
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Underground plan, Battery Section (Rietvlei no. 113)
Underground plan, Battery Section (Rietvlei no. 113)
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings of South Reef
Underground workings of South Reef
Underground workings of Battery and Bird Reef
Underground workings of Battery and Bird Reef
Underground workings of South Reef
Underground workings of South Reef
Underground workings of South Reef
Underground workings of South Reef
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
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