BARRETT, D.R.; ALLSOPP, H.L. Rubidium-strontium age determinations on South African kimberlite pipes. International Kimberlite Conference: Extended Abstracts, [S. l.], v. 1, p. 23–25, 1973. DOI: 10.29173/ikc837. Disponível em: https://ikcabstracts.com/index.php/ikc/article/view/837. Acesso em: 4 dec. 2024.