000 00276nam a2200121Ia 4500
654 _aELN
100 _aDuncan, R.L.; Drew, C.E. & Greenberg, A.E.
245 _aRadio Telegraphy And Telephony
260 _bJWA
_c1931
082 _bDUN
300 _a222p.
999 _c9239
_d9239
041 _aeng
655 _aF-01
546 _aText in English
300 _c23 cm.