TY  - BOOK
AU  - Coates, R. F. W.
TI  - Modern communication systems
SN  - 0333333446
AV  - TK5101.A3 .C6 1975.
PY  - 1975///
CY  - London
PB  - Macmillan press Ltd
KW  - modern communication systems
N1  - Includes bibliographical appendices and index
ER  -