1980. Seventh Edition; Revised. 312 pages. Pictorial dust jacket over blue cloth. Bright and clean pages with light tanning to text block edges. Binding is firm throughout with minor thumb-marking. Boards have light edge wear with minor corner bumping. Mild crushing to spine, with occasional markings overall. Book has forward lean. Unclipped jacket has light edgewear with tears and creasing. Visible rubbing and marking all over.