000
00279nam a22001097a 4500
082
_a
004.6
_b
BLD
100
_a
UYLESS BLACK
_9
90423
245
_a
DATA NETWORKS concepts,theroy,and practice
_c
BLACK UYLESS
260
_a
new jersy
_b
prentice hall
_c
1997
546
_a
eng
942
_c
BK
999
_c
72225
_d
72225