00719nam0-22002651i-450-990001071640403321000107164FED01000107164(Aleph)000107164FED0100010716420000920d1959----km-y0itay50------baengMasersMicrowave Amplification and Oscillation by Stimulated EmissionGordon TroupLondon [etc.]Methuen1959Semiconduttori537.622Troup,Gordon John50992ITUNINARICAUNIMARCBK99000107164040332130-0171387FI1FI1Masers336505UNINAING01