1950. 12th Edition. 403 pages. Pictorial dust jacket over brown cloth. Binding remains firm. Pages are lightly tanned throughout. Previous owner's inscriptions to front free endpaper. Boards have light shelf-wear with corner bumping. Light tanning to spine and edges with crushing to spine ends. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Light tanning to spine and edges. Water staining to spine and front panel.