Berg, G.W. “Mineralogical Evidence For, and Experimental Evidence Against, Carbonate from the Mantle in Xenoliths from Kimberlite Pipes”. International Kimberlite Conference: Extended Abstracts 7, no. 1 (April 17, 1998): 79-80. Accessed October 15, 2019. https://ikcabstracts.com/index.php/ikc/article/view/2638.