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Historical Papers Research Archive, University of the Witwatersrand James Charles Napoleon Humphreys, Mining papers
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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 Battery and Bird Reef
Underground workings of Battery and Bird Reef
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
Underground workings of South Reef
Underground workings of South Reef
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings of Main Reef
Middelvlei Black Reef Gold Prospecting Dev. Synd. Ltd.
Middelvlei Black Reef Gold Prospecting Dev. Synd. Ltd.
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