1960. 4th Edition, Revised. 280 pages. This is an ex-Library book. Pictorial dust jacket over grey cloth. Expected library inserts, stamps and inscriptions. Black and white photographs and illustrations throughout. Slight cracking to gutters with exposed netting, pages slightly loose. Pages and photographs have light tanning and foxing throughout. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Small areas of loss to spine ends. Light tanning to spine and edges. Wear marks overall.