Proofs, Magnus Liber Organi I colour photo for cover

Editions de l'Oiseau-Lyre, Proofs, Magnus Liber Organi I colour photo for cover (1932-2012), [UMA-ITE-2016003300028]. University of Melbourne Archives, accessed 26/01/2025, https://archives.library.unimelb.edu.au/nodes/view/366881