%0 Journal Article %T SM–ND isotopic investigations of Isua supracrustals and implications for mantle evolution %A HAMILTON, P. J. %A O'NIONS, R. K. %A EVENSEN, N. M. %A BRIDGWATER, D. %A ALLAART, J. H. %J Nature %V 272 %N 5648 %P 41-43 %@ 0028-0836 %D 1978-03-02 %I Nature Publishing Group UK %~ DeepDyve