01475aam 2200421I 450 991071005510332120151118015323.0GOVPUB-C13-a5cf84ee178d7864648646e0195a17a4(CKB)5470000002475725(OCoLC)929881535(EXLCZ)99547000000247572520151118d1975 ua 0engrdacontentrdamediardacarrierImproved ultrasonic standard reference blocks /D. G. Eitzen; G. F. Sushinsky; D. J. Chwirut; C. J. Bechtoldt; A. W. RuffGaithersburg, MD :U.S. Dept. of Commerce, National Institute of Standards and Technology,1975.1 online resourceNBSIR ;75-6851975.Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.Title from PDF title page.Includes bibliographical references.Eitzen D. G1388169Bechtoldt C. J1418067Chwirut Daniel J1390278Eitzen D. G1388169Ruff Arthur W1388187Sushinsky George F1403673United States.National Bureau of Standards.NBSNBSGPOBOOK9910710055103321Improved ultrasonic standard reference blocks3528408UNINA