1972. Revised Edition. 536 pages. No dust jacket. Blue cloth with gilt lettering. Written in many different languages. Pages remain bright and clear, with mild foxing to textblock edges. Binding is firm. Previous owner's inscription to front free endpaper. Boards and spine have minimal shelf-wear, with minor corner bumping and crushing to ends. Spine and edges are heavily sunned. Noticeable rubbing and small marks overall. Gilt is bright.