99 pages. This is an ex-Library book. Paperback book with paper cover. BIOS Final Report No. 1049 Item No. 22 - German Acetylene Chemical Industry Acetaldehyde Manufacture. Library stamp to front cover. Pages are mostly clean overall, with moderate tanning throughout. Staple binding is firm with noticeable rust. Text is unaffected. Paper covers have mild edge wear with creasing and scuffing. Visible sunning to spine. Heavy black marks overall.