Reel-to-reel audio tape recording in a box labelled, 'Copy [Don] Roberto [a play by Alanna Knight]. Reel 2 of 2'., [1973.], Acc.11897A Box 5(3). Papers and audio recordings relating to the work of John Gray as a radio broadcast producer., Acc.11897A. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/67911 Accessed May 05, 2024.