@book{26060,
	author = {Hall, Arthur Lewis,},
	title = {Corundum in the Northern and Eastern Transvaal /},
	publisher = {Govt. Print. and Stationery Office,},
	year = {1920.},
	series = {Memoir ;},
	address = {Pretoria :},
	note = {At head of title: Union of South Africa, Department of Mines and Industries, Geological Survey.}
}