00906nam0-22003011i-450-99000046688040332120090224110515.03-540-50818-X000046688FED01000046688(Aleph)000046688FED0100004668820020821d1989----km-y0itay50------baenga-------101yyFrequency standards and metrologyproceedings of the Fourth symposium, Ancona, Italy, september 5-9, 1988editor A. De MarchiBerlinSpringer-Verlag©1989484 p.ill.24 cmMetrologiaCongressi389.1De Marchi,A.25759ITUNINARICAUNIMARCBK99000046688040332110 PRO 294858 DEEDINELDINELFrequency standards and metrology331775UNINA