000 00271nam a2200121Ia 4500
008 190216s9999||||xx |||||||||||||| ||und||
100 _aSankaranarayan S R
245 0 _aSound
260 _bSulthan Chand&Sons
_c1919
300 _a610p
650 _aPhysics
942 _cBK
999 _c33012
_d33012