Glick, Thomas F. (2005). "Toledo". In Thomas F. Glick; Steven John Livesey; Faith Wallis (eds.). Medieval science, technology, and medicine: an encyclopedia. New York: Routledge. pp. 478–481. ISBN978-0-415-96930-7.
Glick, Thomas F. (2005). "Toledo". In Thomas F. Glick; Steven John Livesey; Faith Wallis (eds.). Medieval science, technology, and medicine: an encyclopedia. New York: Routledge. pp. 478–481. ISBN978-0-415-96930-7.