000
00244nam a2200109Ia 4500
008
220201s1981 xx 000 0 eng d
100
_a
Soni, ML
245
0
_a
Electrical technology
260
_b
Dhanpat Rai
_c
1981
300
_a
11
942
_2
ddc
999
_c
81421
_d
81421