@booklet {4585,
	title = {AMARAL, G. 1978. Potassium-argon age studies on the Jacupiranga alkaline district, State of Sao Paulo, Brasil. Proceedings of the First International Symposium on Carbonatites, Pocos de Caldas, Brasil: 297-302.},
	year = {1978},
	note = {AMARAL, G. 1978. Potassium-argon age studies on the Jacupiranga alkaline district, State of Sao Paulo, Brasil. Proceedings of the First International Symposium on Carbonatites, Pocos de Caldas, Brasil: 297-302.}
}
