TY  - BOOK
AU  - Gehris,Dennis
TI  - Communication technologies
SN  - 0130400246
AV  - TK5101 .G36 2002
U1  - 621.382  22nd ed.
PY  - 2002///
CY  - Upper Saddle River, N.J.
PB  - Pearson Education
KW  - Telecommunication
KW  - Information technology
N1  - Includes index
ER  -