00342nam a2200145Ia 4500008004100000020001800041082001000059082001000069100001500079100000800094245003900102260001300141260002500154999001700179240117s9999||||xx |||||||||||||| ||und||  a81-219-2447-2  aR. /P  b530.4  amurugeshan  ar.  0aproperties of matter and acoustics  anewdelhi  bs.chand &company ltd  c15930d15930