- ZA HPRA A3299-C-C3-C3.2
- Unidad documental compuesta
Parte deHilda and Rusty Bernstein Papers
Correspondence with John Connell Associates, London, written to Rusty Bernstein at the Pretoria Local Jail, who was by then Awaiting Trial prisoner for the upcoming Rivonia trial. Including description of the Telephone dialling attachment and Certificate of Registration of the device in the records of Ideas Marketing Pool (IMP), dated 27 April 1964.