01617nam 2200457Ia 450 991071110300332120180711121001.0GOVPUB-C13-9082774d86f368f7201c03719b097055(CKB)5470000002480986(OCoLC)959982890(OCoLC)995470000002480986(EXLCZ)99547000000248098620161006d1954 ua 0engtxtrdacontentcrdamediacrrdacarrierStudy of optical system for airport traffic signal projector /E.W. CrouchGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,1954.1 online resourceNBS report ;30871954.Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Title from PDF title page.Includes bibliographical references.AirportsTraffic controlDisplay systemsAirportsTraffic controlDisplay systemsfastAirportsTraffic controlDisplay systems.AirportsTraffic controlDisplay systems.Crouch E. W1407169Crouch E. W1407169United States.National Bureau of Standards.NBSNBSOCLCOOCLCFOCLCQBOOK9910711103003321Study of optical system for airport traffic signal projector3487817UNINA