@book{28490,
	author = {Nel, H. J. and Strauss, C. A. and South Africa.},
	title = {Papers on the mineralogy of southern Africa /},
	publisher = {Govt. Printer,},
	year = {1949.},
	series = {Geological Survey memoir ;},
	address = {Pretoria :},
	note = {At head of title: Union of South Africa, Department of Mines.}
}