1964. Third Impression. 223 pages. Red jacket over purple cloth. Contains black and white diagrams throughout. Pages are lightly tanned, but text remains clear. Binding is slightly shaky, but all pages remain attached. Previous owner's inscriptions to front free endpaper and fore edge. Small brown mark also to fore edge. Boards and spine have minimal shelf-wear, with minor bumping to corners and crushing to ends. Unclipped jacket. Moderate tanning to spine. Minimal edgewear with a fem small tears.