MCCALLUM, M.E.; EGGLER, D.H.; SMITH, C.B. Discrete nodule assemblages in kimberlites from northern Colorado and southern Wyoming. International Kimberlite Conference: Extended Abstracts, [S. l.], v. 2, n. 1, p. 205–207, 1977. DOI: 10.29173/ikc992. Disponível em: https://journals.library.ualberta.ca/ikcabstracts.com/index.php/ikc/article/view/992. Acesso em: 19 dec. 2025.