@book{27102,
	author = {Nel, Louis T.},
	title = {The Witwatersrand system in the Klerksdorp-Ventersdorp area:},
	publisher = {The government printer,},
	year = {1934.},
	series = {South Africa. Geological Survey, Geological series. Bulletin},
	address = {Pretoria,},
	note = {At head of title: ... Union of South Africa, Department of mines.}
}