TY  - BOOK
AU  - Black, Uyless D.,
TI  - Computer networks : protocols, standards, and interfaces
SN  - 9788120310414
U1  - 004.6 BLA 
PY  - 1993///
CY  - New Delhi
PB  - PHI
N1  - `The professional`s guide` -- c.p.
ER  -