000 00318nam a2200121Ia 4500
008 210901s1981 xx 000 0 eng d
082 _a537.534 SAI
100 _aSaihgal, R.L.
245 0 _aOscillations and waves acoustics and optics
260 _aNew Delhi
_bS.Chand
_c1981
650 _aPhysics
942 _2ddc
_cBK
_01
999 _c15169
_d15169