Ulbrich, M.N.C., and O.H. Leonardos. “The Ultrabasic Potassic Rocks of Presidente Olegario, Serra Da Mata Da Corda, Minas Gerais, Brazil”. International Kimberlite Conference: Extended Abstracts 5 (February 1, 1991): 437–439. Accessed April 24, 2024. https://ikcabstracts.com/index.php/ikc/article/view/2596.