Third edition. 55 pages. No dust jacket. Blue boards with gilt lettering to spine and front. Black and white photographic plates throughout. Couple of charts to back. Binding remains firm. Pages and plates are moderately tanned throughout. Previous owner's inscription to front endpaper. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends. Tanning to spine and edges. Gilt lettering is darkened slightly.