Interpolation by J. F. Steffensen
1950. Second Edition. 248 pages. No dust jacket. Green cloth. Pages remain bright and clear with minimal tanning and foxing. Previous owner's inscription to front pastedown. Thumb-marking present. Noticeable creasing to gutter. Cracking to gutters, with exposed netting. Boards have mild edge-wear with slight rubbing to surfaces. Some crushing to spine ends. Light tanning to spine and edges. Small marks and scratches to boards. Textblock is shaky.