. . . . . . "Bright-chromium linewidth standard, SRM 476, for calibration of optical microscope linewidth measuring systems" . "Bright-chromium linewidth standard, SRM 476, for calibration of optical microscope linewidth measuring systems"@en . . . . . . . . . . . . "Bright-chromium linewidth standard, SRM 476, for calibration of optical microscope linewidt measuring systems" . . . . . . . . . . .