Interview of Prof Hubert H. Lamb conducted by Robert Ratcliffe on 25 April 1985.
Interview of Robert A.S. Ratcliffe conducted by David Pedgley on 9 February 1993.
Interview of Robert P. Pearce conducted by David Pedgley on 10 November 1994.
Interview of RJ Ogden by Don McNaughton on 4 March 1992.