TY  - BOOK
AU  - Harb,M.
TI  - Modern telephony
SN  - 0135987725
U1  - 621.385 19
PY  - 1989///
CY  - Englewood Cliffs, NJ
PB  - Prentice Hall
KW  - Telephone
KW  - Telephone systems
N1  - Includes index
ER  -