Skinner, E.M.W., K.S. Viljoen, T.C. Clark, and C.B. Smith. “The Petrography, Tectonic Setting and Emplacement Ages of Kimberlites in the South Western Border Region of the Kaapvaal Craton, Prieska Area, RSA”. International Kimberlite Conference: Extended Abstracts 5 (February 1, 1991): 373–375. Accessed March 28, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2574.