1. The national head and spinal cord injury survey: Major findings;Kalsbeek;J Neurosurg,1980
2. Survival after spinal cord trauma: A life table analysis;Mesard;Arch Neurol,1978
3. Spinal cord injury statistics: Experience of the regional spinal cord injury systems;Young,1982
4. Spinal Cord Injury: The Facts and Figures;Stover,1986
5. Standards for Neurological Classification of Spinal Injury Patients;American Spinal Injury Association,1982