Allsopp, H. L., C. B. Smith, J. W. Bristow, R. Brown, J. D. Kramers, and O. G. Garvie. “A Review of Radiometric Dating Methods Applicable to Kimberlites and Related Rocks”. International Kimberlite Conference: Extended Abstracts 4, no. 1 (September 19, 1986): 109–111. Accessed November 21, 2024. https://ikcabstracts.com/index.php/ikc/article/view/1089.