McCallum, M.E., C.B. Mabarak, and H.G. Coopersmith. “Diamonds from Kimberlite in the Colorado-Wyoming State Line District”. International Kimberlite Conference: Extended Abstracts 2, no. 1 (September 12, 1977): 208–210. Accessed November 24, 2024. https://ikcabstracts.com/index.php/ikc/article/view/993.