1952. First Edition. 208 pages. Yellow jacket over brown cloth with gilt lettering to spine. Black and white graphs throughout. Pages are lightly tanned and foxed, but text remains clear. Binding is firm. Boards and spine have minimal shelf-wear, with minor denting and creasing to edges and crushing to ends. Unclipped jacket. Label to left flap. Light tanning and foxing to all surfaces. Panels and spine have moderate edgewear, with noticeable chipping, tearing and areas of loss.