No Edition Remarks. 159 pages. This is an ex-Library book. Blue paperback. Expected library inserts, stamps and inscriptions. Deutsche Vacuum Oel A.G. Hamburg-Germany, Fuels And Lubricants, BIOS final Report No. 967, Item No. 30. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Rusty staple binding. Binding remains firm. Paper covers have moderate edge-wear with curling to corners and rubbing to surfaces. Noticeable tanning to spine and edges. Brown marks to covers.