Paul, D.K., J.H. Crocket, and P.H. Nixon. “Abundances of Palladium, Iridium and Gold in Kimberlites and Associated Nodules”. International Kimberlite Conference: Extended Abstracts 2, no. 1 (September 12, 1977): 258–260. Accessed May 3, 2024. https://ikcabstracts.com/index.php/ikc/article/view/1012.