1. Reports of Hovercraft Development Ltd., Tracked Hovercraft Division, 1960–1967, and Reports of Tracked Hovercraft Ltd. 1967–1973, respectively HDL and THL collections, deposited in the National Museum of Science & Industry/Imperial College Library, London.
2. `Hovershow 66 Souvenir Programme', The British Hovercraft Association, June 1966.
3. 'Tracked Hovercraft in Britain', promotional brochure by the Tracked Hovercraft Division of Hovercraft Development Ltd., June 1966.
4. 'A Note on Hovertrains and Levapads', Saunders Roe Ltd. 1960, op. cit. (1).
5. 'Tracked Hovercraft Ltd.—Appendices To The Minutes Of Evidence', The Select Committee on Science and Technology, Session 1972–73, HMSO, 5 July 1973, Submission by Professor F.T. Barwell.