1. See: Stone J. F. S. (1958). Wessex Before the Celts. Thames & Hudson, London.
2. For further information, see Wells T. C. E., Sheail J., Ball D. F. and Ward L. K. J. (1976). ‘Ecological studies on the Porton Ranges: relationships between vegetation, soils and land-use history’. J. Ecology 64, 589–626.
3. Harris S. H. (1994). Factories of Death; Japanese Biological Warfare 1932–1945 and the American Cover-up. Routledge, London. See also: Williams P. and Wallace D. (1989). Unit 731: The Japanese Army’s Secret of Secrets. Hodder & Stoughton, London.
4. Wickham Steed H. (1934). ‘Aerial Warfare: Secret German Plans’. The Nineteenth Century and After 116, 1–15.
5. Wickham Steed H. (1934). ‘The Future of Warfare’. The Nineteenth Century and After 116, 129–40.