1968. Revised Editon. 496 pages. Red paper cover. Pages are lightly tanned and foxed throughout. Occasional thumb-marking present. Slight cracking to front hinge. Binding remains firm. Paper cover has mild edge wear with scuffing to edges and creasing. cuffing to spine ends. Book has rolled spine. Moderate sunning to spine and edges. Mild rubbing to surfaces with curling to corners.