1978. Sixth and Revised Edition. 192 pages. Pictorial dust jacket over blue cloth. Contains black and white photographs. 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. Clipped jacket has light edgewear with tears and creasing. Moderate tanning to spine. Light rubbing and marking all over.