by I. Perepechko ;translated from the Russian by Artavaz Beknazarov. byV. M. Potapov ; translated from the Russian by Artavaz Beknazarov. L. I. Antropov ; translated from the Russian By Artavaz Beknazarov. N.N.Lebedev ; translated from the Russian by A.Beknazarov. P. S. Kireev ; translated from the Russian by Mark Samokhvalov. by G. I. Epifanov ; translated from the Russian by Mark Samokhvalov. I. Weinberg; translated from the Russian by N. Komissarova. M. K. Poltev; translated from the Russian by V. Kolykhmatov. V. A. Kovalevsky ; translated from the Russian by Arthur Brown. by D. N. Reshetov ; translated from the Russian by Nicholas Weinstein.