byV. M. Potapov ; translated from the Russian by Artavaz Beknazarov. L. I. Antropov ; translated from the Russian By Artavaz Beknazarov. by I. Perepechko ;translated from the Russian by Artavaz Beknazarov. N.N.Lebedev ; translated from the Russian by A.Beknazarov. by G. I. Epifanov ; translated from the Russian by Mark Samokhvalov. V.V. Petrov ; translated from the Russian by A.A. Brown. G. G. Polikarpov ; translated from the Russian by Scripta Technica. M. K. Poltev; translated from the Russian by V. Kolykhmatov. V. A. Kovalevsky ; translated from the Russian by Arthur Brown. V. N. Kobranova ; translated from the Russian by V. V. Kuznetsov.