Shee, S.R., and J.J. Gurney. “The Mineralogy of Xenoliths from Orapa, Botswana”. International Kimberlite Conference: Extended Abstracts 2, no. 1 (September 12, 1977): 299–301. Accessed March 28, 2024. https://ikcabstracts.com/index.php/ikc/article/view/1028.