N.V. Efimov ; translated from the Russian by P.C. Sinha. V.V. Petrov ; translated from the Russian by A.A. Brown. L.I. Sedov ; translated from the Russian by V.I. Kisin. G. E. Shilov ; translated from the Russian by V. I. Kisin. G.E. Shilov ; translated from the Russian by S. Sosinsky. L.V. Tarasov ; translated from the Russian by V. Kisin. L.V. Tarasov ; translated from the Russian by Ram S. Wadhwa. I.M. Sobol ; translated from the Russian by V. I. Kisin. N.M. Pokrovsky, translated from the Russian by I. V. Savin. A. Luikov ; translated from the Russian by T. Kortneva.