• publisher: London, C. Lockwood and sons
  • creator: Rühmer, Ernst Walter, 1878- Erskine-Murray, James, 1868- tr
  • contributor: Erskine-Murray, James, 1868- tr.
  • Keyword: Radio.
  • years: 1908.
  • pages: xiii, 224 p.
  • language: eng
  • class: TK6550
  • download: pdf file