International Conference on Spectroscopy at Radiofrequencies (1950 Sept. 18-23 : Amsterdam, Netherlands)
Proceedings of the International Conference on Spectroscopy at Radiofrequencies, Amsterdam, 18-23 September 1950 / Netherlands Physical Society ; supported by International Union of Pure and Applied Physics and U.N.E.S.C.O.
Radiofrequency spectroscopy -- Congresses.
Nederlandse Natuurkundige Vereniging.
International Union of Pure and Applied Physics.