1970. Eleventh Edition. 590 pages. No dust jacket. Blue cloth boards with gilt lettering. Clean pages with light tanning and mild foxing throughout. Pencil and pen markings to front pastedown and free endpaper. Price sticker stuck to front pastedown. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Minor sunning to spine and edges with crushing to spine ends. Minor wear marks to boards.