1. Current population reports, series P-25, no. 952. Projections of the population of the United States, by age, sex, and race: 1988 to 2080;US Bureau of the Census,1989
2. vital statistics of the United States, 1984;National Center for Health Statistics,1987
3. Current population reports, series P-25, no. 1080. Projections of the population of the United States, by age, sex, and race: 1988 to 2080;US Bureau of the Census,1989
4. Management of trauma in the elderly patient;Santora;Surg Clin North Am,1994
5. Craniofacial trauma in the elderly patient;Goldschmidt;J Oral Maxillofac Surg,1995