Affichage de 1594 résultats

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Historical Papers Research Archive, University of the Witwatersrand James Charles Napoleon Humphreys, Mining papers
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Surface plan
Surface plan
Surface plan
Surface plan
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings of Upper Leaders
Underground workings of Upper Leaders
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground workings of Main Reef and Main Reef Leader
Underground workings of Main Reef and Main Reef Leader
Underground plan of Main Reef Leader workings
Underground plan of Main Reef Leader workings
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