|Citation=Spier, J. and J. Kagan (2000), “Sir Charles Frederick and the forgery of ancient coins in eighteenth-century Rome”, Journal of the History of Collections, 12 (1), pp. 35-90. | |Citation=Spier, J. and J. Kagan (2000), “Sir Charles Frederick and the forgery of ancient coins in eighteenth-century Rome”, Journal of the History of Collections, 12 (1), pp. 35-90. |