000
00286nam a2200121Ia 4500
008
220201s1974 xx 000 0 eng d
082
_a
621.382
_b
DAS
100
_a
P.N. dAss
245
0
_a
Line telegraphy
260
_a
Calcutta
_b
Modern book agency
_c
1974
300
_a
203
942
_2
ddc
999
_c
22699
_d
22699