TY  - BOOK
AU  - Tolhurst,M.R.(Editor)
TI  - Open Systems Interconnetion
SN  - 9780333468036
U1  - 001.64404 OPE 
PY  - 1988///
PB  - Macmillan.
N1  - KOP KEDAI BUKU UM/NO,LO
ER  -