Ya.S. Bugrov, S.M. Nikolsky ; translated from the Russian by Leonid Levant. Ya S. Bugrov, S. M. Nikolsky, translated from the Russian by Leonid Levant. Ya.S. Bugrov, S.M. Nikolsky ; translated from the Russian by Leonid Levant.A collection of problems. A. Kutepov, A. Rubanov ; translated from the Russian by Leonid Levant. N. Antonov ... [et al.] ; translated from the Russian by Leonid Levant. V.A. Kudryavtsev and B.P. Demidovich ; translated from the Russian by Leonid Levant. S. H.Bogolyubov, translated from the russian by Leonid Levant. V. O. Gordon, Yu. B. Ivanov, T. E. Solntseva ; translated from the Russian by Leonid Levant. S. M. Nikolsky ; translated from the Russian by V. M. Volosov. O.V. Manturov and N.M. Matveev ; [translated from Russian by Leonid Levant].