Phillips, D., G.B. Kiviets, E.S. Barton, C.B. Smith, K.S. Viljoen, and L.F. Fourie. “40Ar/39Ar/Dating/of/Kimberlites/and/Related/Rocks:/Problems/and/Solutions”. International Kimberlite Conference: Extended Abstracts 7, no. 1 (April 17, 1998): 690–692. Accessed December 6, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2848.