Telecommunications /
Blackwell, A. G.
Telecommunications / by A. G. Blackwell. - pages 15-17 : illustrations ; 28 cm
Below author's name: "Manager for Jamaica of Cable and Wireless, Ltd."
Cables, Submarine--West Indies.
Telecommunication--West Indies.
Cables, Submarine.
Telecommunication.
West Indies.
Telecommunications / by A. G. Blackwell. - pages 15-17 : illustrations ; 28 cm
Below author's name: "Manager for Jamaica of Cable and Wireless, Ltd."
Cables, Submarine--West Indies.
Telecommunication--West Indies.
Cables, Submarine.
Telecommunication.
West Indies.