MARX (Roger). The social art. Paris, Bibliothèque Charpentier - Eugène Fasquelle, 1913. In-8, first edition in sheets. Limited edition of XX numbered copies on Arches vellum signed by the author reserved for the members of the bibliophilic society of the "XX", this one n°XIV. Covers detached and preserved. In a slipcase with the initials of the "XX" society. (cracks in the slipcase, slight lack at the corner of the cover)