SIGNED BY OTTO-MÜLLER-MAIN with dedication dated 1932. RARE collection of studies in psychology from the dialectical materialist perspective by Manes Sperber, Otto-Müller-Main, Alice Rühle-Gerstel, Fritz Künkel, Benno Stein, Ilse Lang, Alfred Appelt, Käte Busch, Georg Polak, Lea Lichtenstein, Hanna Lubinsky and Edith Cohn. 240x160mm. 142 pages. Yellow cloth Hardcover with brown lettering on front cover an spine. Cover and spine dirty and slightly stained. Cover corners rubbed. Spine edges slightly bumped. Dedication written in ink on front whitepage. Text block edges, inner cover and pages yellowing. [SUMMARY]: This extremely rare book is in good condition.