000
00285nam a2200121Ia 4500
008
220201s1984 xx 000 0 eng d
082
_a
530
_b
SHA
100
_a
Sharma,LP&Saxena,HC
245
0
_a
Osillations waver & sound
260
_b
S.chand&co.
_c
1984
300
_a
256
942
_2
ddc
999
_c
83213
_d
83213