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041 _aEN
082 _a534
_bSAI
_223
100 _aSAIHGAL, R.L.
245 2 _aA textbook of sound /
_c[by] R.L.Saihgal
260 _aNew Delhi
_bS.Chand & Co.
_c1990
300 _a283 p.
942 _cS