MCCALLUM, M.E.; EGGLER, D.H.; BURNS, L.K. Kimberlitic diatremes in northern Colorado and southern Wyoming. International Kimberlite Conference: Extended Abstracts, [S. l.], v. 1, p. 217–220, 1973. DOI: 10.29173/ikc889. Disponível em: https://ikcabstracts.com/index.php/ikc/article/view/889. Acesso em: 19 apr. 2024.