00318nam a2200121 a 450000500170000002000150001708200150003210000160004724500320006326000360009530000180013149000470014920251203110114.0  a8121918480  a534,AROb_  aArora, C.L.  aWaves, Vibrations and sound  aNew DelhibS. Chand & Co.c1999  a255p.c23 cm.  aS. Chand's simplified course B.Sc. physics