Troup, Gordod . Masers and Lasers / Textual Documents Gordod Troup. - 2nd ed. / - London : Metheen & Co Ltd , 1963. - viii,189p. ; 18cm. Index Subjects--Index Terms: Masers Lasers Microwave Maser G-Physics Dewey Class. No.: 538.8 / T 757 M