http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Refractive error characteristics of early and advanced presbyopic individuals
K. W. Welsh P. G. Rasmussen, and J. A. Vaughan ; Civil Aeromedical Institute, Federal Aviation Administration, Oklahoma City, Oklahoma.
Prepared under Task number AM-A-77-PHY-95.