PACS:91.10.Nj, 91.10.Op, 94.20.Bb (all) DOI:10.1070/PU1971v014n03ABEH004721 URL: https://ufn.ru/en/articles/1971/3/s/ Citation: Fleer A G "Correlation between Changes in the Phase Velocity of Propagation of Ultralong Radio Waves and of the Earth's Motion about the Mass Center" Sov. Phys. Usp.14 369–370 (1971)