1. BBC (2007). Madeleine evidence ‘may be lost.’ www.news.bbc.co.uk/1/hi/uk/6761669.stm. Accessed 20th June 2007.
2. Bennett WW and Hess KM (2004). Criminal Investigation (7th Edition). Thompson Wadsworth, Belmont, CA.
3. Block EB (1958). The Wizard of Berkeley. Coward-McCann, New York.
4. British Geological Survey (2006). Mineral Planning Factsheet — Kaolin. www.mineralsuk.com/ britmin/mpfkaolin.pdf. Accessed 20th June 2007.
5. Bull PA, Morgan RM and Dunkerley S (2005). Letter to the editor — ‘SEM-EDS analysis and discrimination of forensic soil’ by Cengiz et al. Forensic Science International 155:222–224.