[1]
E. Skinner, K. Viljoen, T. Clark, and C. Smith, “The Petrography, Tectonic Setting and Emplacement Ages of Kimberlites in the South Western Border Region of the Kaapvaal Craton, Prieska Area, RSA”, IKC abstracts, vol. 5, pp. 373–375, Feb. 1991.