• publisher: Washington, Govt. print. off.
  • creator: United States. National Bureau of Standards
  • Keyword: Electrical engineering Safety measures. Accidents Prevention.
  • years: 1921.
  • pages: 366 p. incl. tables, chart.
  • language: eng
  • lccn: s
  • class: QC100
  • notes: At head of title: Department of commerce. Bureau of standards. S. W. Stratton, director.
  • download: pdf file