Boyd, F.R., P.H. Nixon, and N.Z. Boctor. 1982. “Quenched Pyroxenite Xenoliths from the Mzongwana Kimberlite Dike, Transkei, Southern Africa”. International Kimberlite Conference: Extended Abstracts 3 (September):243-43. https://doi.org/10.29173/ikc2361.