No Edition Remarks. 33 pages. This is an ex-Library book. Blue paper cover. Full title: BIOS Final Report No. 1142 The Wuntershall-Schmalfeldt Process for the Manufacture of Synthesis Gas. Expected library inserts, stamps and inscriptions. Black and white illustrations to last few pages. Binding remains firm. Pages are lightly tanned throughout. Paper cover has mild edgewear with curling to corners. Light tanning to spine and edges. Staple marking to both covers.