Ventilationthe Students' Text Book Of Heating And Ventilation by Norman Wignall
1966. Eleventh Edition. 195 pages. No dust jacket. Green cloth boards with a green spine strip. Contains in-text monochromatic illustrations throughout. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Mild crushing to spine ends. Book has a slight forward lean.