1972. Ritchie Calder and Vivien Heilbron. RDG. Edinburgh Arts 1972.

3 - 28 July 1972. Edinburgh Arts lecturers Baron Peter Ritchie Calder (scientist, writer, Professor of International Relations, University of Edinburgh) and Vivien Heilbron (actress) at RDG, 8 Melville Crescent, Edinburgh. Edinburgh Arts 1972.