TY  - BOOK
AU  - Bates, Regis J.
AU  - Gregory, Donald W.
TI  - Voice and Data Communications Handbook 
SN  - 0072122765
U1  - 004.602 
PY  - 2000///
CY  - New York : 
PB  - McGraw-Hill, 
KW  - Telecommunication Handbooks Manuals
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-07-212276-5.pdf
ER  -