1966. 13th Impression. 388 pages. Green jacket over green cloth with gilt titles to spine. Includes various diagrams. Upper text block edge green. Pages have slight foxing, tanning and minor thumbing. Foxing more intense towards the start and end of the book and on text block edges. Endpapers have strips of tanning caused by jacket. Liquid droplet marks to upper text block edge. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. Gilt is bright. Unclipped jacket has light edgewear with small tears and creasing. Jacket is slightly rubbed and marked overall. Spine is sunned.