1956. 7th Edition. 114 pages. Yellow dust jacket over red cloth. Black and white illustrations throughout. Binding remains firm. Pages and illustrations have light tanning and foxing throughout. Previous owner's inscriptions to front free endpaper and text block edges. Boards have light shelf-wear with corner bumping. Very slight crushing to spine ends. Clipped jacket has moderate edgewear with chips, tears, and creasing. Light tanning to spine and edges. Wear marks overall.