References
- Barker V., Harden R. M. MAVIS — A medical audiovisual aids information service. J. Audiov. Media Med. 1979; 2: 60–63
- The Grammar of Television Production. G. Millerson. Focal Press, London
- Video Fact Sheets, Studio 99, Video Ltd, 79 Fairfax Road, Swiss Cottage, London NW64EE