1967. 4th Edition, Revised. 336 pages. Grey dust jacket over blue cloth. 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 light edgewear with tears and creasing. Light tanning to spine and edges. Water staining to both panels. Wear marks overall.