TY  - BOOK
AU  - Bates,Regis J.
AU  - Bates,Marcus
TI  - Principles of voice & data communications
SN  - 0072257326 (alk. paper) :
AV  - TK5101 .B3153 2007
U1  - 621.382 22
PY  - 2007///
CY  - Boston
PB  - McGraw-Hill Irwin
KW  - Telecommunication
KW  - sears
N1  - Includes index
ER  -