by V. V. Penkovskii. [Translated by Scripta Technica inc., Washington, D. C.] A.A. Pervozvanskii ; Translated by Scripta Technica, Inc. ; Translation editor, Ivo Herzer. [by] N. V. TSederberg. Translation by Scripta Technica. Edited by Robert D. Cess. [by] L. S. Palatnik and A. I. Landau. Translated by Scripta Technica, inc. Edited by Joseph Joffe. [by] J. Bass ; translated by Scripta Technica, Inc. bu Veniamin G. Levich ;translated by Scripta Technica, inc.