1. A national study by the Royal College of Radiologists. Patient selection for skull radiography in uncomplicated head injury;Lancet,1983
2. Skull X-rays after recent head injury;Jennett;Clin Radial,1980
3. Implementation of guidelines for the use of skull radiographs in patients with head injuries;Fowkes;Lancet,1984
4. The cost of X-rays;Stilwell;Br J Radiol,1984
5. A protocol for selecting patients with injured extremities who need X-rays;Brand;N Engl J Med,1982