TY  - BOOK
AU  - Bates J., Bates M.
AU  - 0
TI  - Principles of voice and data communications
U1  - 621.382 B-30 21
PY  - 2007///
CY  - 0
PB  - McGraw-Hill
KW  - 0
N1  - 0; 0; 0
N2  - NULL
ER  -