• publisher: Washington, Govt. Print. Off.
  • creator: Squier, George Owen, 1865- United States. Army. Signal Corps. Professional paper
  • contributor: United States. Army. Signal Corps. Professional paper.
  • Keyword: Telephone. Telegraph.
  • years: 1911.
  • pages: 102 p.
  • class: TK6421
  • notes: On verso of t.-p.: War Department. Document no. 390.
  • download: pdf file