1. Can the velocity of propagation of radio waves be measured by shoran;Aslakson;Trans. Amer. Geophys. Union,1949
2. A determination of the velocity of light;Bergstrand;Arkiv för Fysik, R. Swedish Acad. Sci.,1950
3. Report on progress in physics;Birge;Spec. Rep., Physical Soc., London,1943
4. The velocity of light;Dorsey;Trans. Amer. Phil. Soc., new ser.,1944
5. The velocity of light and of radio waves;Essen;Letter in Nature,1950