000
00264nam a2200121Ia 4500
008
220201s1967 xx 000 0 eng d
082
_a
621.3
100
_a
Singhal, SP
245
0
_a
Electrical technology
260
_b
Delhi
_c
1967
300
_a
592
942
_2
ddc
999
_c
74490
_d
74490