1960. 4th Edition. 544 pages. Green dust jacket over green cloth. Binding remains firm. Pages have light tanning and foxing throughout. Heavier to endpapers and pastedowns. Previous owner's inscription to front pastedown. Boards have light shelf-wear with corner bumping. Light tanning to spine and edges with crushing to spine ends. Unclipped jacket has light edgewear with tears and creasing. Light tanning to spine and edges. Foxing overall.