@book{27967,
	author = {Kent, L. E. and Russell, H. D.},
	title = {Fluorspar in the Union of South Africa and South West Africa,},
	publisher = {The Government Printer,},
	year = {1943.},
	series = {South Africa. Geological Survey. Geological series bulletin},
	address = {Pretoria,},
	note = {Cover title.}
}