Understanding telecommunications /
Overman, Michael, 1920-,
Understanding telecommunications / by Michael Overman. - London : Lutterworth, 1974. - 192 pages : illustrations ; 23 cm.
Includes index.
0718820037
Telecommunication.
Telecommunication--History.
Understanding telecommunications / by Michael Overman. - London : Lutterworth, 1974. - 192 pages : illustrations ; 23 cm.
Includes index.
0718820037
Telecommunication.
Telecommunication--History.
