Suwa, K., S. Oana, H. Wada, and S. Osaki. “Isotope Geochemistry and Petrology of the African Carbonatites”. International Kimberlite Conference: Extended Abstracts 1 (August 13, 1973): 297–300. Accessed May 4, 2024. https://ikcabstracts.com/index.php/ikc/article/view/912.