Kmberlite from central Angola: a case study of exploration findings - Jelsma, H.; Krishnan, U.; Perritt, S.; Preston, R.; Winter, F.; Lemotlo, L.; van der Linde, G.; Armstrong, R.; Philips, D.; Joy, S.; Costa, J.; Facatino, M.; et al. (International Kimberlite Conference: Extended Abstracts, 2012)