|Citation=Weiss, Robert (1964), "Petrarch the Antiquarian", in C. Henderson (ed.), Classical Medieval and Renaissance. Studies in Honour of Berthold Louis Ullman, II, Rome, 1964, p. 199-209. | |Citation=Weiss, Robert (1964), "Petrarch the Antiquarian", in C. Henderson (ed.), Classical Medieval and Renaissance. Studies in Honour of Berthold Louis Ullman, II, Rome, 1964, p. 199-209. |