Bell, Keith Nd, Pb and Sr Isotopic Compositions of East African Carbonatites: Evidence for Mantle Mixing and Plume Inhomogeneity - Oxford Oxford University Press October 2001 - pp. 1927-1945 ilus., tbls. ISSN: 0022-3530 Subjects--Topical Terms: CARBONATITACOMPOSICION QUIMICAISOTOPOSMANTORIFT Subjects--Geographic Terms: AFRICA