1965. Sixth impression. 499 pages. Pictorial dust jacket over red cloth. Black and white diagrams throughout. Pages and binding are presentable with no major defects. Minor issues present such as mild cracking, inscriptions, inserts, light foxing, tanning and thumb marking. Overall a good condition item. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Unclipped jacket has heavy edge wear with large tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.