1975. Twenty-Fourth Edition. 255 pages. Dust jacket over blue cloth. Book is in better condition than most examples of this age. Neat, clean, well bound pages with very minimal foxing, tanning and thumbing. Small inscriptions and neat labels may be present. 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. Mild droplet to front panel. Moderate tanning to spine and edges.