1968. Revised Edition. 150 pages. Dust jacket over blue cloth. Clean pages with light tanning and foxing throughout. Tightly bound with faint thumb-marking throughout. Notable droplets to upper text block edge. Boards have light shelf-wear with corner bumping. Mild crushing to spine ends. Book has forward lean. Droplet to front board. Unclipped jacket has light edgewear with tears and creasing. Mild foxing. Heavy tanning to spine. Heavy rubbing and marking all over.