No Edition Remarks. 37 pages. This is an ex-Library book. Blue paperback report. Full title: Bios No 1183, Item No.9. Anti-reflection Surfaces on Glass, Optical Cements and Etching Resist for Fine Lines. 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.