1. Manual Undersea Science and Technology, Fiscal Year 1974 Report, National Oceanic and Atmospheric Administration, Rockville, Maryland. Government Printing Office, 1974, p. 8.
2. U.S. Navy Diving Manual, vol. 1. U.S. Government Printing Office, 1973, Sec. 7, p. 12.
3. The Physiology and Medicine of Diving and Compressed Air Work;Bennett,1975
4. Complications associated with the wearing of contact lenses;Dixon;J.A.M.A.,1966