Bright-chromium linewidth standard, SRM 476, for calibration of optical microscope linewidth measuring systems [microform] / Carol F. Vezzetti, Ruth N. Varner, James E. Potzick
Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 1991. Washington, DC : For sale by the Supt. of Docs., U.S. G.P.O.