Page:Benton 1959 The Clock Problem (Clock Paradox) in Relativity.djvu/54

 having accuracies of the order of 1 part in 1012 in discerning the time shift predicted by the theory of relativity.

Also in Proceedings of the 3rd American Astronautical Society, December 6-7, 1956, p.127-135.

Brief description of the space clock conceived by I. M. Levitt of Fels Planetarium.

In Russian.