Troup, Gordon Masers microwave amplification and oscillation by stimulated emission Gordon Troup - London Methuen 1959 - x+168p. biblio; figs; index - Methuen's Monographs on Physical Subjects . Subjects--Topical Terms: Microwave AmplificationStimulated Emission Universal Decimal Class. No.: 621.3.029.5:621.373.8 / TRO