00287nam a2200109Ia 4500008004100000082002400041100001200065245003900077250000900116260004300125300000900168240913s9999||||xx |||||||||||||| ||und||  aGS    533.62  SEN/A  aS.N Sen 0aAcoustics : waves and oscillations  aNULL  bNew Age InternationalaNew Delhic1990  a234p