1965. Fifth Edition, Revised. 256 pages. Illustrated dust jacket over black cloth covered boards with gilt. Pull out chart. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Previous owner's inscription to front free end-paper. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Cloth has minor damp and dust stains. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is bright and clear. Unclipped jacket has moderate edge-wear with chips, tears and creasing.