000 00273nam a2200109Ia 4500
008 210901s1988 xx 000 0 eng d
082 _a537.534 GUP
100 _aGupta, S K
245 0 _aWaves and oscillations
260 _aNew Delhi
_bR Chand & Co.
_c1988
942 _2ddc
_cBK
999 _c18294
_d18294