TY  - BOOK
AU  - Longley,G.
AU  - Ronayne,John P.
TI  - Telecommunication primer
SN  - 0-273-60157-1
AV  - MGT TK5101.L3165 
PY  - 1993///
CY  - London
PB  - Pitman
KW  - Telecommunication
N1  - Includes index
ER  -