1964. British edition. 367 pages. White jacket over grey cloth with gilt titles to spine. Preface by K L Johnson. Graphs and charts throughout. Pages have slight foxing, tanning and minor thumbing.Foxing more noticeable towards the start and end of the book. Previous owner's inscription to front endpaper. Slight red smudge to text block edge. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Gilt is bright. Unclipped jacket has some edgewear with chips, tears and creasing. Jacket is slightly rubbed and marked overall.