New York: Philosophical Library, 1961. hardcover. Translated from the Russian and with a foreword by Ralph B. Winn. 109 pages, slim 8vo, red cloth, dust wrapper (chip on spine; publication date written in pen on front free endpaper). New York: Philosophical Library, (1961). A very good(+) copy in a very good(-) dust wrapper. very good(+) / very good(-).