1. A point of view: what has technology done to gastroenterology?;Booth;Gut,1985
2. Christopher Booth;Lock;BMJ,2012
3. The Royal College of Physicians and Oxford Brookes University, Medical Sciences Video Archive MSVA 034,1988
4. Point of view: upper intestinal endoscopy;Clark;Lancet,1985
5. British Society for Digestive Endoscopy;Truelove;Gut,1987