1967. Revised Edition. 311 pages. Illustrative jacket over blue cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Light creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Soft crushing to spine ends. Water staining to front board. Minor marks to boards. Unclipped jacket has moderate edgewear with chips, tears and creasing. Light tanning to spine. Some rubbing to surfaces. Scuffing to edges.