1966. 4th Edition. 276 pages. Pictorial dust jacket over green cloth. Binding remains firm. Pages are lightly tanned throughout. Previous owner's inscription to front free endpaper. Boards have light shelf-wear with corner bumping. Light sunning to spine and edges with crushing to spine ends. White marking to front board. Unclipped jacket has light edgewear with tears and creasing. Light tanning to spine and edges. Water staining to spine and front panel. Light foxing overall.