Objects
Howarth, Geoffrey H. Rhodes University; 2010. Geology of the Kroonstad kimberlite cluster, South Africa.
Hanson, E Kelsey, Moore, John M, Bordy, Emese M, Marsh, Julian S, Howarth, Geoffrey H, Robey, Julian van Aardt. Cretaceous erosion in central South Africa: evidence from upper-crustal xenoliths in kimberlite diatremes. 2009.