1978 · 19 citations · 5 references
Natural SciencesAstronomyInterstellar MediumHydrogen AtomHydrogen Maser StandardsMaser Spectroscopy
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Daniel Kleppner, H. Mark Goldenberg, Norman F. Ramsey · Physical Review · 1962 · 274 citations
Hydrogen-Maser Principles and Techniques
Daniel Kleppner, Howard C. Berg, S. B. Crampton et al. · Physical Review · 1965 · 237 citations · Full text
Dynamics of a Simple Maser Model
J.H. Shirley · American Journal of Physics · 1968 · 25 citations
Hydrogen Standard Work at Goddard Space Flight Center
H.E. Peters, T. E. Mcgunigal, E. H. Johnson · 1968 · 17 citations · Full text