Reprinted from Perceptual and Motor Skills, 1963, 17, p. 643-646.
Bibliography
Includes bibliographical references.
Reproduction
Electronic reproduction. Washington, D.C. : FAA. Mode of access: Internet from the FAA web site. Address as of 9/25/06: http://www.faa.gov/library/reports/medical/oamtechreports/1960s/media/AM64-10.pdf; current access is available via PURL.