000
00249nam a2200109Ia 4500
008
220201s1998 xx 000 0 eng d
100
_a
SCHWEBEN, W.L.
245
0
_a
DATA COMMUNICATION
260
_b
MC-GRAW HILL
_c
1998
300
_a
564
942
_2
ddc
999
_c
67846
_d
67846