Eggler, David H., M.E. McCallum, and C.B. Smith. “Discrete Nodule Assemblages in Kimberlites from Northern Colorado and Southern Wyoming: Evidence for a Diapric Origin of Kimberlite”. International Kimberlite Conference: Extended Abstracts 2, no. 1 (September 12, 1977): 75–77. Accessed March 29, 2024. https://ikcabstracts.com/index.php/ikc/article/view/948.