@booklet {7422,
	title = {HARMER, R.E. 1999. The petrogenetic association of carbonatite and alkaline magmatism: constraints from the Spitskop complex, South Africa. Journal of Petrology, 40: 525-48.STRAUSS, C.A. and TRUTER, F.C. 1950a. The alkali complex at Spitskop, Sekukuniland},
	year = {1999},
	note = {HARMER, R.E. 1999. The petrogenetic association of carbonatite and alkaline magmatism: constraints from the Spitskop complex, South Africa. Journal of Petrology, 40: 525-48.STRAUSS, C.A. and TRUTER, F.C. 1950a. The alkali complex at Spitskop, Sekukuniland, eastern Transvaal. Transactions of the Geological Society of South Africa, 53: 81-125.SUWA, K., OANA, S., WADA, H. and OSAKI, S. 1975. Isotope geochemistry and petrology of African carbonatites. Physics and Chemistry of the Earth, 9: 735-45.VERWOERD, W.J. 1967. The carbonatites of South Africa and South West Africa. Geological Survey of South Africa, Handbook, 6: 1-452VERWOERD, W.J. 1986. Mineral deposits associated with carbonatites and alkaline rocks. In C.R. Anhaeusser and S. Maske (eds), Mineral deposits of Southern Africa, 2: 2173-91. The Geological Society of South Africa, Johannesburg.}
}
