No Edition Remarks. 56 pages. This is an ex-Library book. Blue paperback report. Full title:B.I.O.S. Final Report No 1131. Item No 22 & 31 - Report on Investigations in Germany on Slag Cements and Lightweight Concrete . Text is typed not printed. Expected library inserts, stamps and inscriptions. Pages are mildly tanned throughout. Text is clear. Binding remains firm. Covers have mild edge-wear with curling to corners. Visible tanning to spine and edges with scuffing to spine ends.