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Descripción archivística
Historical Papers Research Archive, University of the Witwatersrand James Charles Napoleon Humphreys, Mining papers Serie
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Belgian Congo
Belgian Congo
Mining Groups
Mining Groups
Bloemhof Wolmaranstad District
Bloemhof Wolmaranstad District
Nigeria
Nigeria
Coal
Coal
Klip River Valley
Klip River Valley
Madagascar
Madagascar
Chrome
Chrome
Lichtenburg
Lichtenburg
Tanganyika
Tanganyika
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