1971. Letter from Demarco to Mark Goldberg (RDG Board member). Ref. forthcoming Ian Hamilton Finlay exhibition at the RDG (December 1971)
1975. Letter from RDG administrator Anne Goring to Scottish artist Fred Stiven, ref. Edinburgh Arts 1975 exhibition and publication.
1970. Letter (page 3/7) from Robert Filliou to Georg Jappe. Ref. The Vocational Game. Strategy: Get Arts.
1973. Exhibition Catalogue. Page 11/25. Hans Hollein. The Austrian Exhibition. RDG, Edinburgh, and Institute of Contemporary Arts, London.