Columbia subject headings:
Diamond mines and mining--South Africa.
Gold mines and mining--South Africa--Witwatersrand.
South Africa--Biography.
South Africa--History.
Witwatersrand (South Africa)
Harvard subject headings:
Diamond mines and mining--South Africa--Witwatersrand.
Gold mines and mining--South Africa--Witwatersrand
South Africa--Biography.
South Africa--History.
Princeton subject headings:
Diamond mines and mining--South Africa.
Gold mines and mining--South Africa--Witwatersrand.
South Africa--Biography.
South Africa--History.
Witwatersrand (South Africa)