Boctor, N. Z., F.R. Boyd, and P.H. Nixon. “Carbonate Tuff from Melkfontein, East Griqualand, South Africa”. International Kimberlite Conference: Extended Abstracts 3 (September 1, 1982): 211–211. Accessed March 29, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2271.