Larsen, Kristine. “The Stone of Erech and the Black Stone of the Ka’aba: Meteorite or ‘meteor-wrong’?”. Mallorn: The Journal of the Tolkien Society, no. 48 (September 1, 2009): 29–32. Accessed October 31, 2024. https://journals.tolkiensociety.org/mallorn/article/view/90.