1958. Revised Edition. 128 pages. Blue dust jacket over yellow cloth. Moderate tanning to pages with slight dog-eared pages throughout and mild tanning to text block edges. Pencil marginalia and annotation throughout. Boards have minor rubbing and light bumping to corners. Soft crushing to spine ends. Clipped jacket with visible edge wear and rubbing. There is visible tearing to corners, edges and spine ends and splitting to joints.