6th Edition, Revised. 304 pages. Pictorial dust jacket over red cloth. Black and white photographic frontispiece with illustrations throughout. Binding remains firm. Pages and illustrations have light tanning and foxing throughout. Boards have light shelf-wear with corner bumping. Creasing to front board. Unclipped jacket has heavy edgewear with areas of loss, heavy tears, chips, and creasing. Tape to inside panels. Light tanning to spine and edges. Wear marks overall.