1. Microwave frequency standards;Lyons H.;Phys. Rev.,1948
2. The atomic clock, an atomic standard of frequency and time;Lyons H.;NBS Tech. News Bull.,1949
3. The atomic clock, an atomic standard of frequency and time;Lyons H.;Horological Inst. Am. J.,1949
4. Microwave spectroscopic frequency and time standards;Lyons H.;Elect. Eng.,1949
5. Program for atomic frequency and time standards;Lyons H.;Proc. I.R.E.,1951