Helmstaedt, H., and D. J. Schulze. “Kimberlites and the Mantle Sample - Can We Decode Their Geotectonic Message?”. International Kimberlite Conference: Extended Abstracts 4, no. 1 (September 19, 1986): 118–120. Accessed May 2, 2024. https://ikcabstracts.com/index.php/ikc/article/view/1092.