||Snow 1977, no. 8: "This is a very faithful manuscript copy (made in Toledo, 1755) of the Toledo MS of the CSM now in the BNM. The copy fills 315 folios and carries several marginal notations by Padre Burriel (reproduced in Anglés, La música, 1943, pp. 20 1). Fol. 10 contains a full-page drawing of Alfonso.This unique copy is BN MS 13055 (olim a. Dd. 74)."