1968. Fourth edition. 176 pages. Pictorial dust jacket over pictorial paper covered boards. Black and white and colour photographs. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Unclipped jacket has light edge wear with minor tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.