000 00270nam a2200109Ia 4500
008 230130s1964 xx 000 0 und d
041 _aeng
082 _a534
100 _aSingh, Harnam
_91478024
245 _aPrinciples of sound
260 _aDelhi
_bAtma Ram & Sons
_c1964
999 _c960636
_d960636