000
00294nam a2200121Ia 4500
008
220201s2007 xx 000 0 eng d
082
_a
621.382
_b
COU
100
_a
Cough,L W
245
0
_a
Digital and analog communication
260
_a
delhi
_b
Pearson Edu.
_c
2007
300
_a
752
942
_2
ddc
999
_c
37359
_d
37359