@book{27633,
	author = {Willemse, Johannes,},
	title = {The gold occurrences south-west of Pietersburg,},
	publisher = {The Government Printer,},
	year = {1938.},
	series = {South Africa. Geological Survey. Geological series. Bulletin},
	address = {Pretoria,},
	note = {At head of title:  Union of South Africa.  Department of Mines.}
}