DONALDSON, C.; REID, A.M.; RIDLEY, W.I.; BROWN, R.W.; DAWSON, J.B. The Igwisi Hills extrusive "kimberlites". International Kimberlite Conference: Extended Abstracts, [S. l.], v. 1, p. 93–93, 1973. DOI: 10.29173/ikc856. Disponível em: https://ikcabstracts.com/index.php/ikc/article/view/856. Acesso em: 5 may. 2024.