1. Alick William Green Whittle interviewed by Hazel de Berg in the Hazel de Berg collection [sound recording] Author: Whittle, A. W. G. (Alick William Green), 1920-, interviewee Format: Audio Language: English Published: 1978 Aug. 23
2. Robert Oliver Chalmers interviewed by Hazel de Berg for the Hazel de Berg collection [sound recording] Author: Chalmers, R. O. (Robert Oliver), interviewee Format: Audio Language: English Published: 1977 May 6