Ingram, David J. E. Radio and microwave spectroscopy / David J. E. Ingram. - London ; Butterworth, 1976. - [6], 167 p. : ill. ; 22 cm. ISBN: 0408706856 Subjects--Index Terms: Radiofrequency spectroscopy Microwave spectroscopy Dewey Class. No.: 537.5/34 / ING