@booklet {6840,
	title = {COLTORTI, M., ALBERTI, A., BECCALUVA, L., DOS SANTOS, A.B., MAZZUCCHELLI, M., MORAIS, E., RIVALENTI, G. and SIENA, F. 1993. The Tchivira-Bonga alkaline-carbonatite complex (Angola): petrological study and comparison with some Brazilian analogues. European},
	year = {1993},
	note = {COLTORTI, M., ALBERTI, A., BECCALUVA, L., DOS SANTOS, A.B., MAZZUCCHELLI, M., MORAIS, E., RIVALENTI, G. and SIENA, F. 1993. The Tchivira-Bonga alkaline-carbonatite complex (Angola): petrological study and comparison with some Brazilian analogues. European Journal of Mineralogy, 5: 1001-24.}
}
