Note 4 — AUTHOR'S PREFACE TO THE SIXTH RUSSIAN EDITION
George Kamensky translation
The English translation was made by G. Kamensky, and edited by A. J. Greenaway; published by Longmans, Green & Co.
George Kamensky translation
The English translation was made by G. Kamensky, and edited by A. J. Greenaway; published by Longmans, Green & Co.