00297nam a2200097Ia 4500008004100000040002900041050002400070100002700094245003700121260004100158221021s9999||||xx |||||||||||||| ||und||  cChuka University Library  aTK 7871 b.T4 1955   aTreman Emmons Fredrick 0aElectronic and radio engineering  aNew YorkbMC Graw Hill Companyc1955