1971. Seventh Impression. 700 pages. Black paper cover. Pages are lightly tanned and foxed throughout. Cracking to hinges with covers slightly coming away from text-block. Occasional thumb-marking present. Light staining to text-block edges. Binding remains firm. Paper cover has mild edge wear with scuffing to edges and creasing. Small splits to joints. Book has rolled spine. Light tanning to spine and edges. Mild rubbing to surfaces with curling to corners.