00290nam a2200121Ia 4500100002300000650002700023654002000050245003500070260002800105082001500133300000800148546001200156  aPhilips hull m.d.   aElectrical Engineering  aSpeaker Systems  aBuilding hi/fi Speaker Systems  bPhilipsakentuckyc1972  a621.389332  a232  aENGLISH