1968. Third Edition. 203 pages. This is an ex-Library book. Beige dust jacket over blue cloth. Expected library inserts, stamps and inscriptions. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Visible creasing to gutter. Boards have mild edge-wear with slight rubbing to surfaces. Some crushing to spine ends. Visible tanning to spine and edges. Tape marks to boards. Textblock is shaky. Clipped jacket has light edgewear with tears and creasing. Notable tanning to spine and edges. Small marks overall.