000
00266nam a22001097a 4500
999
_c
452892
_d
452892
020
_a
9789812549662
082
_a
004.6
100
_a
SHAY,William.A
245
_a
Understanding communications and networks
260
_a
singpore
_b
Thomson Learning
_c
2004
942
_c
BK