000
00243nam a22001097a 4500
082
_a
43-44/01
_b
02
100
_a
Uyless Black
_9
90423
245
_a
Data Net Works
_b
Concepts. Theory. and pratice
260
_c
1997
300
_a
877p
942
_c
BK
999
_c
70172
_d
70172