1955. First Edition. 266 pages. Dust jacket over blue cloth. Three technical schematics at rear. Pages are lightly tanned. Heavy cracking to front hinge, front free endpaper. Mild thumb-marking present. Blacked out inscription to half title page. Boards have light shelf-wear with corner bumping. Mild crushing to spine ends. Books has a backward lean. Boards are mildly warped. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Moderate rubbing and marking all over.