1959. 7th Impression Revised; Enlarged. 255 pages. Pictorial dust jacket over blue cloth. Black and white photographs and illustrations throughout. Binding remains firm. Pages and illustrations are lightly tanned throughout. Boards have light shelf-wear with corner bumping. Very slight crushing to spine ends. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Light tanning to spine and edges. Water staining to spine, edges and front panel.