Irving, A.J., and S.M. Kuehner. “Petrology and Geochemistry of the Ruby Slipper Lamproite, Western Montana: A Leucite-Bearing, Ultrapotassic Magma in an Eocene Continental Arc”. International Kimberlite Conference: Extended Abstracts 7, no. 1 (April 17, 1998): 349–351. Accessed October 31, 2024. https://journals.library.ualberta.ca/ikcabstracts.com/index.php/ikc/article/view/2731.