Brown, John Microwave lenses. With a foreward by Willis Jackson. - London, Methuen New York Wiley [1953] - 125 p. illus. 17 cm. - Methuen's monographs on physical subjects . LCCN: 53013401 Subjects--Topical Terms: Electron optics.Dielectrics. LC Class. No.: QC447 / .B77 Dewey Class. No.: 535 537.1*