Practical Air Navigation: Simply Explained by Group Captain J. K. Summers
1941. Reprinted September 1941. 57 pages. No dust jacket. Blue cloth boards with lettering. Contains black and white illustrations. Moderate crinkling to gutters however binding remains firm. Pages are heavily tanned with noticeable foxing. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Slight crushing and fraying to spine ends. Lettering is darkened. Moderate tanning to spine and edges.