MITCHELL, R.H.; BRUNFELT, A.O. Rare earth element geochemistry of kimberlite. International Kimberlite Conference: Extended Abstracts, [S. l.], v. 1, p. 235–238, 1973. DOI: 10.29173/ikc894. Disponível em: https://ikcabstracts.com/index.php/ikc/article/view/894. Acesso em: 1 may. 2024.