No Edition Stated. 96 pages. No dust jacket. Blue paper covered boards with illustration stuck to front. Contains black and white photographic frontispiece, with other plates throughout. Also contains diagrams. Pages are mildly tanned, but text remains clear. Visible marks to some pages, but text is unaffected. Binding is firm. Previous owner's inscription to front free endpaper, with small label to pastedown opposite. Boards have heavy shelf-wear, with visible corner bumping and noticeable scuffing to edges. Spine and edges are heavily sunned, with visible crushing and splitting to ends. Light rubbing and scuffing overall. Minor backwards lean.