000 00320nam a2200133Ia 4500
008 210901s1990 xx 000 0 eng d
082 _a537.534 GUP
100 _aGupta, S K
245 0 _aWaves and oscillations
250 _a2nd ed.
260 _aNew Delhi
_bR Chand & Co
_c1990
300 _a13.19p.
942 _2ddc
_cBK
999 _c19822
_d19822