1961. 5th Edition. 636 pages. Pictorial dust jacket over blue cloth. Binding remains firm. Pages are lightly tanned throughout. Previous owner's inscription to half-title page. Front free endpaper cut out. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Light tanning to spine and edges.