1961. Ninth Edition. 159 pages. This is an ex-Library book. White dust jacket over blue cloth. Expected library inserts, stamps and inscriptions. Jacket has been laminated to boards. Report of the Commission on Enzymes of the International Union of Biochemistry 1961. Pages remain bright and clear with minimal tanning and foxing. Scuffing to front pastedown. Tape marks to free endpapers and pastedowns. Visible creasing to gutter. Boards are presumed clean as jacket is taped down. Unclipped jacket has heavy edgewear with some areas of loss, heavy tears, chips and, creasing. Notable tanning to spine. Visible rubbing to surfaces. Grubby panels overall.