1. Levels of cognitive functioning. Rehabilitation of the head injured adult: comprehensive physical management;Hagen,1979
2. Accuracy and relationship of mechanism of injury, trauma score, and injury severity score in identifying major trauma;Long;Am J Surg,1986
3. The role of helmets in reducing head injuries from motorcycle accidents: a political or medical issue?;Luna;West J Med,1981
4. Oregon motorcycle accidents 1960–1985,1985
5. Accident facts,1986