00369nam a2200133Ia 450000100060000000800410000604000130004708200200006010000220008024500570010226000580015930000110021754600070022824088140410s9999    xx            000 0 und d  cPK-LaUMT  a 621.388bROB-T  aFrederick Roberts  aTelevision:bhow things developedcFrederick Roberts  aLondon,UK:bThe Educational Supply Association,c1960  a105 p.  aEN