FireDOC Search

displaying 1 - 1 results in total 1

• Howett, G. L.
  view article (1.0)

  Size of Letters Required for Visibility as a Function of Viewing Distance and Observer Visual Acuity.
  National Bureau of Standards, Washington, DC
  NBS TN 1180
  Department of Labor, Washington, DC, NBS TN 1180
  July 1983
  72 p.