van CollerB., HildebrandP., VerranD., BarnesF., NowickiT.E., BaumgartnerM., OttL., and GurneyJ.J. 2003. “Southern African Case Studies of Variations in Indicator Mineral Characteristics With Distance from Kimberlite Source”. International Kimberlite Conference: Extended Abstracts 8 (June). https://doi.org/10.29173/ikc3130.