1. An attempt to quantify the economic benefits of scientific research;Byatt,1969
2. Value of Curiosity-oriented Research
3. Building Research Establishment CP 5675 Energy Conservation (Garston, Watford, England 1975), p. 21.
4. Digest of United Kingdom Energy Statistics;Department of Energy,1975
5. Parliamentary answer on 18 November 1976 (Hansard, column 745). p. 29.