01321aam 2200385I 450 991071115680332120151019095113.0GOVPUB-C13-6ad35ae78c1fa448349cdbe9fb18e0c3(CKB)5470000002480443(OCoLC)925473023(EXLCZ)99547000000248044320151019d1967 ua 0engrdacontentrdamediardacarrierColor of signal lights their selection, definition, measurement, production, and use /F. C. BreckenridgeGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,1967.1 online resourceNBS monograph ;751967.Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Title from PDF title page.Includes bibliographical references.Color of signal lights Breckenridge F. C1400233Breckenridge F. C1400233United States.National Bureau of Standards.NBSNBSGPOBOOK9910711156803321Color of signal lights3466764UNINA