London: Kegan Paul, 1934. hardcover. Translated with an Introduction by M. Black. 101pp. 16mo, red cloth-backed boards (top corners lightly bumped; owner's signature inside front cover and endpaper). London: Keagan Paul, 1934. A very good(+) copy of this scarce and important book. very good(+).
Psyche Miniatures, General Series No. 63.