01651nam 2200469Ia 450 991071114480332120180711121000.0GOVPUB-C13-1f44d4f1b812770bf357e0077257c9ac(CKB)5470000002480564(OCoLC)959982809(OCoLC)995470000002480564(EXLCZ)99547000000248056420161006d1954 ua 0engtxtrdacontentcrdamediacrrdacarrierImprovement of visual aids for air navigation progress report March 1, 1954 to June 30, 1954 /F.C. BreckenridgeGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,1954.1 online resourceNBS report ;36471954.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 Landing aids (Aeronautics)Landing aids (Aeronautics)fastLanding aids (Aeronautics)Landing aids (Aeronautics)Breckenridge F. C1400233Breckenridge F. C1400233United States.National Bureau of Standards.NBSNBSOCLCOOCLCFOCLCQBOOK9910711144803321Improvement of visual aids for air navigation3498944UNINA