1968. Third Edition. 308 pages. Illustrated dust jacket over green cloth covered boards with gilt. Pages remain clear with minimal tanning and foxing. Minor pencil marking to front free end-paper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is bright and clear. Clipped jacket has light edge-wear with tears and creasing. Moderate sunning to spine.