000
00252nam a2200121Ia 4500
008
220201s1969 xx 000 0 eng d
082
_a
621.31912
100
_a
Bansal,SP
245
0
_a
Direct Current
260
_c
1969
300
_a
180
942
_2
ddc
999
_c
73949
_d
73949