000 002790000a22001210004500
245 _aElectron tubes and semicondustors
100 _aDeFrance, J.J.
260 _aNew Jersey
_bPrentice Hall
_c1958
300 _a254 p.
080 _a621.382
_bD4
041 _aEN
942 _cBK
999 _c52729
_d52729