1959. 6th Impression. 526 pages. Black and blue dust jacket over blue cloth. Slight cracking to gutters causing binding to be loose, however pages remain attached. Pages are lightly tanned throughout. Sticker to front pastedown. 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.