000 00261nam a2200109Ia 4500
008 250604s9999 xx 000 0 und d
100 _aSubrahmanyam, N.
245 0 _aWaves and Oscillations
260 _bVikash
_aNew Delhi
_c2018
300 _a431
942 _cBK
999 _c18251
_d18251