1. Kurtzke J F 1975 Epidemiology of Spinal Cord Injury. Experimental Neurology 48: 163–236.
2. Collins J G Types of Injuries and Impairments Due to Injuries. In: Vital and Health Statistics. Series 10, No. 159. U.S. Department of Health and Human Services Publication (PHS): 87–1587.
3. Hyattsville, M D 1987: National Center for Health Statistics: pp. 48-49.
4. DeVivo M J, Fine P R, Maetz H M, Stover S L 1980 Prevalence of spinal cord injury: A re-estimation employing life table techniques. Archiv Neurol 37: 707–708.
5. U.S. Bureau of the Census Current Population Reports, Series P-23, No. 159. Population Profile of the United States: 1989. Washington, DC.: U.S. Government Printing Office. 1989: pp. 44-45.