1. Pillet J: Pillet Hand Prostheses, Ltd. Promotional pamphlet.
2. The Physically Impaired Population of the United States;Firing,1978
3. Survey of prosthetic practice 1973-1974;Fishman;Orthot Prosthet,1975
4. Relative incidences of new amputations;Kay;Orthot Prosthet,1975
5. Prevalence of Selected Impairments, United States, 1971,1971