Research in the Witwatersrand basin :
Minter, W. E. L.
Research in the Witwatersrand basin : our foremost economic resource / W.E.L. Winter. - Capetown : University of Capetown, 1984.
Research in the Witwatersrand basin : our foremost economic resource / W.E.L. Winter. - Capetown : University of Capetown, 1984.