00485nas a2200073   4500008003900000245026000039210006900299856004300368       1989                          d00aCILEK, V.G. 1989. Industrial minerals of Mozambique. Geological Survey, Prague. 326 pp.GITTINS, J. 1966. Summaries and bibliographies of carbonatite complexes. In O.F. Tuttle and J. Gittins (eds), Carbonatites, 417-570. John Wiley, New York.VAIL, J.R. 1960 aCILEK VG 1989 Industrial minerals of Mozambique Geological Surve  uhttps://alkcarb.myrocks.info/node/7270