1. Guideline 5, Trent Health—Focus on quality assurance in radiation protection,1994
2. Quality Systems Part 2, Guide to quality management or quality system elements for services;International Standards Organisation, ISO 9004,1991
3. Reject analysis: its role in quality assurance;Watkinson;Radiography,1994
4. A two year reject/retake profile analysis in pediatric radiology;Chu,1982
5. Estimation from samples;Fairhurst,1981