1956. No Edition Remarks. 505 pages. No dust jacket. Green cloth with gilt lettering. Black and white photographic plates and graphs throughout. Light foxing and tanning to pages; more prominent to text block edges, pastedowns and free endpapers. Owner's stamp to front free endpaper. Binding remains firm. Boards have minor corner bumping and edgewear with light scuffing overall. Spine has soft crushing to ends. Lettering remains bright and clear. Book has a slight forward lean.