Brookins, D.G., R.S. Della Valle, and S.L. Bolivar. “Significance of Uranium Abundance in United States Kimberlites”. International Kimberlite Conference: Extended Abstracts 2, no. 1 (September 12, 1977): 44–46. Accessed April 29, 2024. https://ikcabstracts.com/index.php/ikc/article/view/937.