Questions and answers on radio and television /

Eitemau Tebyg

• Radio and television : questions & answer/
  gan: 195845 Hellyer, H. W., et al.
  Cyhoeddwyd: (1976)
• Radio operating questions and answers
  gan: 207608 Hornung, Julius Lawrence, et al.
  Cyhoeddwyd: (1964)
• Radio operating questions and answers
  gan: 207608 Hornung, Julius Lawrence, et al.
  Cyhoeddwyd: (1955)
• Radio operating questions and answers/
  gan: 207608 Hornung, Julius Lawrence
  Cyhoeddwyd: (1950)
• Radio amateurs' examination questions and answers
  gan: Radio Society of Great Britain. Education Committee
  Cyhoeddwyd: (1977)