1977. Information Sheet. Lecture by Demarco: From Hagar Qim to the Ring of Brodgar. Ref. Demarco's Edinburgh Arts lecture tour in North America.
1973. Letter (page 1/3) from Antoine Grimaud (Groupe Lettriste, Paris) to Sally Holman (RDG administrator), ref. proposed programme of Lettriste films at the RDG.