Wilshire, H.G., and J.W. Shervais. “Al-Augite and Cr-Diopside Ultramafic Xenoliths in Basaltic Rocks from Western United States: Structural and Textural Relationships”. International Kimberlite Conference: Extended Abstracts, vol. 1, Aug. 1973, pp. 321-4, doi:10.29173/ikc918.