01640nam 2200469Ia 450 991071126630332120180711121001.0GOVPUB-C13-f2c2d4503d73a1c0197a5b4b21febcd4(CKB)5470000002481357(OCoLC)959982853(OCoLC)995470000002481357(EXLCZ)99547000000248135720161006d1954 ua 0engtxtrdacontentcrdamediacrrdacarrierImprovement of visual aids for air navigation progress report July 1, 1953 to February 28, 1954 /F.C. BreckenridgeGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,1954.1 online resourceNBS report ;31851954.Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Title from PDF title page.Includes bibliographical references.Improvement of visual aids for air navigation Aids to air navigationAids to air navigationfastAids to air navigation.Aids to air navigation.Breckenridge F. C1400233Breckenridge F. C1400233United States.National Bureau of Standards.NBSNBSOCLCOOCLCFOCLCQBOOK9910711266303321Improvement of visual aids for air navigation3498944UNINA