Physics : correspondence course in telecommunications engineering/

Eitemau Tebyg

• Mathematics for telecommunication : correspondence courses in telecommunications engineering/
  gan: Great Britain. General Post Office. Engineering Department
  Cyhoeddwyd: (1953)
• Telecommunications (principles) : correspondence courses in telecommunications engineering/
  gan: Great Britain. General Post Office. Engineering Department
  Cyhoeddwyd: (1954)
• Telecommunications (principles): correspondence courses in telecommunications engineering/
  gan: Great Britain. General Post Office. Engineering Department
  Cyhoeddwyd: (1954)
• Elementary telecommunications practice : correspondence courses in telecommunications engineering/
  gan: Great Britain. General Post Office. Engineering Department
  Cyhoeddwyd: (1953)
• Machine drawing: correspondence courses in telecommunications engineering /
  gan: Great Britain. General Post Office. Engineering Department
  Cyhoeddwyd: (1953)