01604aam 2200421I 450 991071004340332120240903231240.0GOVPUB-C13-335c2cdb4cb475e965b05ada83560f18(CKB)5470000002475844(OCoLC)929881972(EXLCZ)99547000000247584420151118d1975 ua 0engrdacontentrdamediardacarrierStudy of the national standards for directional and other official signs overview of their adequacy /John V. Fechter; Valom J. Pezoldt; J. J. Persensky; J. Richard LepkowskiGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,1975.1 online resourceNBSIR ;75-7771975.Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Title from PDF title page.Includes bibliographical references.Study of the national standards for directional and other official signsFechter John V.1947-Fechter John V1394989Lepkowski J. Richard1393423Persensky J. J1393314Pezoldt V. J1393040United States.National Bureau of Standards.NBSNBSGPOBOOK9910710043403321Study of the national standards for directional and other official signs4210176UNINA