@booklet {7273,
	title = {MENGE, G.F.W. 1986. Sodalite carbonatite deposits of Swartbooisdrif, South West Africa/Namibia. In C.R. Anhaeusser and S. Maske (eds), Mineral deposits of southern Africa, 1: 2261-8. Geological Society of South Africa, Johannesburg.VERWOERD, W.J. 1967. Th},
	year = {1986},
	note = {MENGE, G.F.W. 1986. Sodalite carbonatite deposits of Swartbooisdrif, South West Africa/Namibia. In C.R. Anhaeusser and S. Maske (eds), Mineral deposits of southern Africa, 1: 2261-8. Geological Society of South Africa, Johannesburg.VERWOERD, W.J. 1967. The carbonatites of South Africa and South West Africa. Handbook, Geological Survey of South Africa, 6: 1-452.}
}
