1961. First Edition. 91 pages. Pictorial dust jacket over yellow cloth. Contains black and white photographic plates, and printed tables. Pages and plates remain bright and clear with minimal tanning and foxing. Binding remains firm. Occasional thumb-marking present. Boards have mild edge wear with slight rubbing to surfaces and bumping to corners. Notable water staining to boards, heavier to front. Light sunning to spine and edges. Boards are bowed and book has a slight forward lean. Unclipped jacket has moderate edge wear with chips, tears and creasing. Moderate water staining to surfaces, with scuffing to panels. Light tanning and foxing to all surfaces.