[by] N. Petrovsky. Translated from the Russian by Horace E. Isakson. [by] V. M. Fridkin; [translated from the Russian by Grace E. Lockie]. S. M. Nikolskii ; translated from the Russian by J. M. Danskin. I. M. Yaglom ; translated from the Russian by I. G. Volosova. V. M. Potapov ; translated from the Russian by Artavaz Beknazarov. A. V. Efimov; translated from the Russian by Leonid Levant. L.V. Tarasov ; translated from the Russian by V. Kisin. Oleg Sentsov ; translated from the Russian by Uilleam Blacker. V.A.Fock; Translated from the Russian by Eugene Yankovsky. N.M. Strakhov ; translated from the Russian by J. Paul Fitzsimmons.