00294nam a2200121Ia 4500008004100000100003000041245002400071260003200095300000900127650001200136942000700148999001700155190216s9999||||xx |||||||||||||| ||und||  aRamamoorthy S And Radha K 2aA Textbook Of Sound  bNational Publicationsc1963  a232p  aPhysics  cBK  c32720d32720