00297nam a2200109Ia 4500008004000000082001600040100004100056245002200097260004500119300001300164650001000177210210b1969   xxu||||| |||| 00| 0 eng d  a530.14 ELMP  aELMORE (William C) & HEALD (Mark A).  aPhysics of waves.  aN DbMcGraw Hill  Kodgakusha Ltd.,c1969  axiii,477  aWaves