@book{27350,
	author = {Hall, A. L. and South Africa.},
	title = {A bibliography of South African geology for the years 1931 to 1935  (inclusive).},
	publisher = {Government printer,},
	year = {1937.},
	series = {Geological survey memoir ;},
	address = {Pretoria :},
	note = {At head of title:  Union of South Africa.  Department of Mines.}
}