00485nas a2200073   4500008003900000245026000039210006900299856004300368       1993                          d00aCOLTORTI, 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. European0 aCOLTORTI M ALBERTI A BECCALUVA L DOS SANTOS AB MAZZUCCHELLI M MO  uhttps://alkcarb.myrocks.info/node/6840