1951. Seventh Edition. 103 pages. No dust jacket. Blue paper covered boards. 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 reasonably firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Sunning to spine. Mild crushing to spine ends. Book has a slight forward lean.