His Majesty's Government and corporations telephone directory.

Eitemau Tebyg

• All India B.J.P. telephone directory
  Cyhoeddwyd: (1981)
• Telephone directory : offices of the government of Pakistan in Islamabad and Rawalpindi
• Proceedings of the Select Committe on Telephone Systems
  Cyhoeddwyd: (1905)
• The telephone: an account of the phenomena of electricity, magnetism, and sound, as involved in its action. With directions for making a speaking telephone
  gan: Dolbear, A. E. (Amos Emerson), 1837-1910
  Cyhoeddwyd: (1877)
• American telephone practice
  gan: Miller, Kempster Blanchard, 1870-1933
  Cyhoeddwyd: (1900)