1990. Seventh Edition. 809 pages. Pictorial dust jacket over purple cloth. Contains black and white photographic plates. Pages and plates are lightly tanned and foxed throughout. Previous owner's inscription to free endpapers. Light thumb-marking present. Binding is slightly shaky. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Small scuffed paper remnant to front board. Light sunning to spine and edges. Unclipped jacket has moderate edge wear with chips, tears and creasing. Speckled dark marks and brown staining to surfaces. Rubbed marking to rear panel. Light sunning to spine and edges.