To see or not to see
Subtitle: visual acuity of pilots involved in midair collisions
By: Leonard C. Ryan ... [et al.].
Contributors: Ryan, Leonard C.; United States. Office of Aviation Medicine.
Series: FAA-AM -- 75-5.; FAA-AM (United States. Office of Aviation Medicine) -- 75-5.
Publisher: Federal Aviation Administration; distr. by National Technical Information Service
Published: 1975
Place of publication: Washington, D.C; Springfield, Va
Language: eng
Subjects: Air pilots.; Aeronautics -- Accidents.
Notes: Cover title.

"September 1975."

Also available online.