Allgre, C.J., P. Richard Manhes, D. Rousseau, and N. Shimizu. 1977. “Pb, Sr, and Nd Isotopes in Minerals from Ultramafic Nodules in Kimberlites”. International Kimberlite Conference: Extended Abstracts 2 (1):7-7. https://doi.org/10.29173/ikc923.